Study sets matching "statistics chapter 7"

Study sets
Classes
Users

Study sets matching "statistics chapter 7"

statistics chapter 7
scatterplots
association
explanatory variable
response variable
shows the relationship between two quantitative variables mea…
direction - positive assocaition - one variable increases so…
the x-axis, the explanatory or predictor variable that explai…
y-axis the variable you hope to predict or explain
scatterplots
shows the relationship between two quantitative variables mea…
association
direction - positive assocaition - one variable increases so…
28 terms
AP Statistics: Chapter 7
Discrete
R.V.
Random Variable
Discrete Random Variable
Countable
Random variable
A Variable whose value is a numerical outcome of a random phe…
X, is a random variable that has a countable number of possib…
Discrete
Countable
R.V.
Random variable
12 terms
Statistics: Chapter 7
sampling error
parameter
simple random sample
population mean
the difference between a measure computer from a sample (a st…
a measure computed from the entire population. As long as the…
a simple selected in such a manner that each possible sample…
sampling error
the difference between a measure computer from a sample (a st…
parameter
a measure computed from the entire population. As long as the…
Statistics: Chapter 7
statistic
parameter
mean
variance
a numerical descriptive measure of a sample
a numerical descriptive measure of a population
statistic: x bar... parameter: mu
statistic: s^2... parameter: σ^2
statistic
a numerical descriptive measure of a sample
parameter
a numerical descriptive measure of a population
Chapter 7 AP Statistics
Parameter
Statistics
Sampling Distribution
Unbiased Estimator
is a number that describes some characteristics of the popula…
is a number that describes some characteristics of the sample
is the distribution of values taken by the statistics in all…
a statistic used to estimate a parameter , if the mean of its…
Parameter
is a number that describes some characteristics of the popula…
Statistics
is a number that describes some characteristics of the sample
AP Statistics Chapter 7
parameter
statistic
sampling distribution
unbiased estimator
a number that describes some characteristic of the population…
a number that describes some characteristic of a sample. This…
the distribution of values taken by the statistic in all poss…
statistic used to estimate a parameter is this if the mean of…
parameter
a number that describes some characteristic of the population…
statistic
a number that describes some characteristic of a sample. This…
31 terms
Chapter 7 Statistics
Perfect "r"
Correlation Little Strength
Correlation Low Strength
Correlation Moderate Strength
Strength/Direction, Larger the r value stronger correlation
0.00-0.25
0.26-0.49
0.50-0.69
Perfect "r"
Strength/Direction, Larger the r value stronger correlation
Correlation Little Strength
0.00-0.25
34 terms
AP Statistics Chapter 7
random variable
discrete
continuous
probability distribution of a discrete…
a numerical variable whose value is determined by the outcome…
can count, isolated points on number line
measured, includes entire interval on number line
gives the probability associated with each x value (formula,…
random variable
a numerical variable whose value is determined by the outcome…
discrete
can count, isolated points on number line
28 terms
AP Statistics: Chapter 7
Probability distribution of X looks li…
Discrete
R.V.
Random Variable
Countable
Random variable
A Variable whose value is a numerical outcome of a random phe…
Probability distribution of X looks li…
Discrete
Countable
Statistics Chapter 7
parameter
statistic
sampling distribution
unbiased statistic
number that describes the population, a fixed number that is…
number that describes a sample, a known number when a sample…
a statistic is distribution of values taken by the statistic…
if the mean of its sampling distribution is equal to the true…
parameter
number that describes the population, a fixed number that is…
statistic
number that describes a sample, a known number when a sample…
10 terms
Statistics (Chapter 7)
Model
Normal Curve
Normally Distributed
Inflection Points
Anything that represents reality.
Bell shaped distribution.
A continuous random variable in which its relative frequency…
The point at which the normal curve changes direction.
Model
Anything that represents reality.
Normal Curve
Bell shaped distribution.
Statistics Chapter 7 Terms
Parameter
Statistic
Sampling distribution
Unbiased Estimator
is a number that describes some characteristic of the populat…
is a number that describes some characteristic of a sample
the distribution of values taken by the statistics in all pos…
a statistic used to estimate the parameter is a ______ if the…
Parameter
is a number that describes some characteristic of the populat…
Statistic
is a number that describes some characteristic of a sample
Statistics Chapter 7
Average
Central limit theorem
Exponential distribution
Mean
A number that describes the central tendency of the data
Given a random variable with known mean and known standard de…
A continuous random variable that appears when we are interes…
A number that measures the central tendency, aka average
Average
A number that describes the central tendency of the data
Central limit theorem
Given a random variable with known mean and known standard de…
23 terms
Statistics Chapter 7
Addition Rule
Complement Rule
Conditional Probability
Disjoint Events
If A and B are disjoint events, the =n the probability of A o…
The probability of an event occurring is 1 minus the probabil…
P(B/A)= (P(A and B))/(P(A))... P(B/A) is read "the probability o…
Two events are disjoint if they have no outcomes in common. I…
Addition Rule
If A and B are disjoint events, the =n the probability of A o…
Complement Rule
The probability of an event occurring is 1 minus the probabil…
11 terms
Statistics Chapter 7
Assumption
Parametric test
Nonparametric test
Robust hypothesis test
a characteristic that we ideally require the population from…
an inferential statistical analysis based on a set of assumpt…
an inferential statistical analysis that is not based on a se…
a test that produces fairly accurate results even when the da…
Assumption
a characteristic that we ideally require the population from…
Parametric test
an inferential statistical analysis based on a set of assumpt…
18 terms
Statistics Chapter 7
hypothesis test
null hypothesis
alternative hypothesis
type I error
process that uses sample statistics to test a claim about the…
statistical hypothesis that contains a statement of equality
complement of the null... - statement that must be true if Ho is…
occurs if the null hypothesis is rejected when it is true
hypothesis test
process that uses sample statistics to test a claim about the…
null hypothesis
statistical hypothesis that contains a statement of equality
Statistics Chapter 7
sampled population
frame
parameter
simple random sample
the population from which the sample is taken
a listing of the elements the sample will be selected from
a numerical characteristic of a population, such as a populat…
a blank of size n from a finite population of size N is a sam…
sampled population
the population from which the sample is taken
frame
a listing of the elements the sample will be selected from
7 terms
Statistics: Chapter 7
Empirical Distribution
Theoretical Distribution
Binomial Distribution
Normal Distribution
Scores that come observations.
Hypothesized scores based on mathematical formulas and logic.
Distribution of the frequency of events that can have only tw…
A bell shaped, theoretical distribution that predicts the fre…
Empirical Distribution
Scores that come observations.
Theoretical Distribution
Hypothesized scores based on mathematical formulas and logic.
34 terms
AP Statistics Chapter 7
random variable
discrete
continuous
probability distribution of a discrete…
a numerical variable whose value is determined by the outcome…
can count, isolated points on number line
measured, includes entire interval on number line
gives the probability associated with each x value (formula,…
random variable
a numerical variable whose value is determined by the outcome…
discrete
can count, isolated points on number line
22 terms
Business Statistics Chapter 7
statistical inference
parameter
statistic
biased, wording, leading, ambiguous, i…
To obtain information about a population from information con…
A numerical characteristic of a population
a numerical characteristic of a sample
Common sampling pitfalls are b______ samples, w________ of qu…
statistical inference
To obtain information about a population from information con…
parameter
A numerical characteristic of a population
Statistics Chapter 7
Population
Parameter
Census
Sample
a big group of people or objects we wish to study
a numerical property that summarizes a characteristic of the…
a survey where every member of the population is measured
a small group of people or objects taken from the population…
Population
a big group of people or objects we wish to study
Parameter
a numerical property that summarizes a characteristic of the…
9 terms
Chapter 7 Statistics Review
Biased Sample
Unbiased Sample/Representative
Statistics
Voluntary Response Sample
is when one or more parts of the population are favored.
is when each item or person in the population is as likely to…
deals with collecting, organizing/analyzing, and interpreting…
involves only those who want to participate in the sampling.
Biased Sample
is when one or more parts of the population are favored.
Unbiased Sample/Representative
is when each item or person in the population is as likely to…
Statistics Vocabulary - Chapter 7
household bias
nonresponse bias
quota sampling bias
response bias
when a sample includes only one member of any given household
make it hard to know which part of the population is underrep…
results when interviewers are given free choice in picking pe…
when the wording of the question changes the true answer
household bias
when a sample includes only one member of any given household
nonresponse bias
make it hard to know which part of the population is underrep…
28 terms
AP Statistics: Chapter 7
Discrete
R.V.
Random Variable
Discrete Random Variable
Countable
Random variable
A Variable whose value is a numerical outcome of a random phe…
X, is a random variable that has a countable number of possib…
Discrete
Countable
R.V.
Random variable
Chapter 7 Statistics
Correlation Little Strength
Correlation Low Strength
Correlation Moderate Strength
Correlation High Strength
0.00-0.25
0.26-0.49
0.50-0.69
0.70-0.89
Correlation Little Strength
0.00-0.25
Correlation Low Strength
0.26-0.49
5 terms
Statistics Chapter 7
Point Estimate
Interval Estimate
Confidence Level
Confidence Interval
A specific numerical value estimate of a parameter. The best…
An interval or range of values used to estimate the parameter…
The probability that the interval estimate will contain the p…
A specific interval estimate of a parameter determined by usi…
Point Estimate
A specific numerical value estimate of a parameter. The best…
Interval Estimate
An interval or range of values used to estimate the parameter…
16 terms
AP Statistics Chapter 7 Vocabulary
Discrete
Continuous
Random Variable
Probability Distribution
A numerical variable that is countable
A numerical variable whose values can be any value on an inte…
A numerical variable with a value determined by the outcome o…
A formula, table, or graph that gives the probability of each…
Discrete
A numerical variable that is countable
Continuous
A numerical variable whose values can be any value on an inte…
20 terms
AP Statistics Chapter 7
What type of graph is used to show the…
When describing a scatterplot, what fo…
What is it meant by an explanatory var…
What is it meant by a response variable?
Scatterplot
1. Direction... 2. Form... 3. How strong the relationship is... 4. The…
The independent variable on the x axis (X variable)
The variable of interest, respondent to the explanatory varia…
What type of graph is used to show the…
Scatterplot
When describing a scatterplot, what fo…
1. Direction... 2. Form... 3. How strong the relationship is... 4. The…
11 terms
Chapter 7 - Statistics and Correlation
data set
range
mean
median
all the data collected in a particular study
Distance between highest and lowest scores in a set of data.
the AVERAGE of a set of data; add them all up and divide the…
,Statistics: Mean, Median, Mode, Range, Graphing Data
data set
all the data collected in a particular study
range
Distance between highest and lowest scores in a set of data.
10 terms
Chapter 7 Statistics Review
Sample
Population
Simple Random Sample
Survey
To save time and money, part of the large group, called a ___…
The large group being studied.
This is when each item or person in the population is as like…
This is a method of collecting information.
Sample
To save time and money, part of the large group, called a ___…
Population
The large group being studied.
7 terms
AP Statistics: Chapter 7: Parameter vs Statistic
Determine whether the numerical value…
Determine whether the numerical value…
Determine whether the numerical value…
Determine whether the numerical value…
STATISTIC - the value $68,000 is a numerical description of a…
STATISTIC - the value of 38% is a numerical description of a…
PARAMETER - the 62 surviving passengers out of 97 total passe…
PARAMETER - the value of 60% is a numerical description of th…
Determine whether the numerical value…
STATISTIC - the value $68,000 is a numerical description of a…
Determine whether the numerical value…
STATISTIC - the value of 38% is a numerical description of a…
AP Statistics Chapter 7
random variable
discrete
continuous
probability distribution of a discrete…
a numerical variable whose value is determined by the outcome…
can count, isolated points on number line
measured, includes entire interval on number line
gives the probability associated with each x value (formula,…
random variable
a numerical variable whose value is determined by the outcome…
discrete
can count, isolated points on number line
12 terms
AP Statistics Chapter 7
Parameter
Statistic
Population mean
Sample mean
A number that describes sole characteristic of the population…
A number that describes some characteristic of a sample. The…
Mew
X bar
Parameter
A number that describes sole characteristic of the population…
Statistic
A number that describes some characteristic of a sample. The…
22 terms
Healthcare Statistics - Chapter 7
Adjusted hospital autopsy rate
Adjusted hospital autopsy rate Formula
Autopsy
Autopsy Rate
The proportion of hospital autopsies performed following the…
Total hospital autopsies X 100/Total # of deaths of hospital…
The postmortem examination of the organs and tissues of a bod…
The proportion or percentage of deaths in a healthcare organi…
Adjusted hospital autopsy rate
The proportion of hospital autopsies performed following the…
Adjusted hospital autopsy rate Formula
Total hospital autopsies X 100/Total # of deaths of hospital…
Statistics Chapter 7
Line Equation
Line
Slope
+ Slope
Y=bX+a
This is defined by slope and intercept; defines a precise 1:1…
b; rate of change of a line
Increases Y
Line Equation
Y=bX+a
Line
This is defined by slope and intercept; defines a precise 1:1…
Statistics Chapter 7A
Central Limit Theorem
Mean of x-bar
Nonsampling Errors
Population Distribution
For a large sample, the shape of the sampling distribution is…
The mean of the sampling distribution
The errors that occur during the collection, recording and ta…
The probability distribution of the population data
Central Limit Theorem
For a large sample, the shape of the sampling distribution is…
Mean of x-bar
The mean of the sampling distribution
12 terms
AP Statistics Chapter 7
Mu
Theta
p
X bar
Population mean.
Population standard deviation.
Population proportion.
Sample mean.
Mu
Population mean.
Theta
Population standard deviation.
Healthcare Statistics - Chapter 7
autopsy
necropsy
postmortem examination
morgue
examination of a dead body to determine the cause of death; c…
another name for autopsy
another name for autopsy
normally the place in a hospital where autopsies are performed
autopsy
examination of a dead body to determine the cause of death; c…
necropsy
another name for autopsy
Statistics Chapter 7&8
Inferential Statistics
Sampling
Random sampling
Types of Distributions
Social scientists want to know about the characteristics of a…
goal: obtain a subset of the population that represents the p…
-each element in the population has an equal chance at being…
1. Population... 2. Sample... 3.Sampling
Inferential Statistics
Social scientists want to know about the characteristics of a…
Sampling
goal: obtain a subset of the population that represents the p…
16 terms
AP Statistics: Chapter 7
What do we use from a sample to draw c…
We take samples from a ______________
A statistic helps us build the _______…
X(bar) and P(hat) are good when they a…
Statistic
Population distribution
Sampling distribution
centered; variability
What do we use from a sample to draw c…
Statistic
We take samples from a ______________
Population distribution
16 terms
Statistics: Chapter 7
Census
Clinical Method
Closed Questions
Face-to-Face
survey of whole population.
interview method using structured questions but may be tailor…
questions with only a specified set of responses that the res…
interview in which researcher and interviewee talk together i…
Census
survey of whole population.
Clinical Method
interview method using structured questions but may be tailor…
16 terms
AP Statistics Chapter 7
parameter
statistic
sampling distribution
unbiased estimator
a number that describes some characteristic of the population…
a number that describes some characteristic of a sample. This…
the distribution of values taken by the statistic in all poss…
statistic used to estimate a parameter is this if the mean of…
parameter
a number that describes some characteristic of the population…
statistic
a number that describes some characteristic of a sample. This…
10 terms
Intro to Statistics Chapter 7
Correlation
Scatterplot (or Scatter Diagram)
Positive Correlation
Negative Correlation
exists between two variables when higher values of one variab…
a graph in which each point represents the values of two vari…
a type of correlation in which both variables tend to increas…
a type of correlation in which the two variables tend to chan…
Correlation
exists between two variables when higher values of one variab…
Scatterplot (or Scatter Diagram)
a graph in which each point represents the values of two vari…
10 terms
AP Statistics Chapter 7
Random Variable
Discrete Random Variable
Continuous Random Variable
Density Curve
A variable taking numerical values determined by the outcome…
Random variable X with a countable number of possible values
Random variable X with values, a random variable whose values…
A mathematical model used to describe the overall pattern of…
Random Variable
A variable taking numerical values determined by the outcome…
Discrete Random Variable
Random variable X with a countable number of possible values
9 terms
Statistics Chapter 7
Hypothesis Test
Statistical Hypothesis
Null Hypothesis
Alternative Hypothesis
a process that uses sample statistics to test a claim
a statement or claim about a population parameter
a statistical hypothesis that contains a statement of equalit…
a statement of inequality, must be true if Ho is false. Denot…
Hypothesis Test
a process that uses sample statistics to test a claim
Statistical Hypothesis
a statement or claim about a population parameter
7 terms
Statistics Chapter 7
parameter
statistic
population distribution
sampling distribution
number that describes a population
number that describes a sample
describes the value of the variable for all individuals in a…
describes the values of the statistic in all possible samples…
parameter
number that describes a population
statistic
number that describes a sample
16 terms
Applied Statistics Chapter 7
bias
selection bias
nonresponse bias
simple random sample
the tendency of a sample statistic to systematically overesti…
a systematic underrepresentation of certain groups from consi…
a systematic difference in preferences between respondents an…
A sample of n observations that has the same probability of b…
bias
the tendency of a sample statistic to systematically overesti…
selection bias
a systematic underrepresentation of certain groups from consi…
Chapter 7 Essential of Statistics
Sampling error
Distribution of sample means
Sampling distribution
Expected value of M
Is the natural discrepancy, or modern era, between a sample s…
D_____ of s_____ m______ is the collection of sample means fo…
S______ d______ is a distribution of statistics obtained by s…
The mean of the distribution of sample means is equal to the…
Sampling error
Is the natural discrepancy, or modern era, between a sample s…
Distribution of sample means
D_____ of s_____ m______ is the collection of sample means fo…
Healthcare Statistics - Chapter 7
Adjusted hospital autopsy rate
Adjusted hospital autopsy rate Formula
Autopsy
Autopsy Rate
The proportion of hospital autopsies performed following the…
Total hospital autopsies X 100/Total # of deaths of hospital…
The postmortem examination of the organs and tissues of a bod…
The proportion or percentage of deaths in a healthcare organi…
Adjusted hospital autopsy rate
The proportion of hospital autopsies performed following the…
Adjusted hospital autopsy rate Formula
Total hospital autopsies X 100/Total # of deaths of hospital…
10 terms
AP Statistics: Chapter 7: Notation
Symbol for Population Mean
Symbol for Population Variance
Symbol for Population Standard Deviation
Symbol for Sample Mean
μ
σ^2
σ
Symbol for Population Mean
μ
Symbol for Population Variance
σ^2
1 of 10