# Study sets matching "statistics chapter 7"

Study sets

Diagrams

Classes

Users

scatterplots

association

explanatory variable

response variable

shows the relationship between two quantitative variables meas…

direction - positive assocaition - one variable increases so d…

the x-axis, the explanatory or predictor variable that explain…

y-axis the variable you hope to predict or explain

scatterplots

shows the relationship between two quantitative variables meas…

association

direction - positive assocaition - one variable increases so d…

sampling error

parameter

simple random sample

population mean

the difference between a measure computer from a sample (a sta…

a measure computed from the entire population. As long as the…

a simple selected in such a manner that each possible sample o…

sampling error

the difference between a measure computer from a sample (a sta…

parameter

a measure computed from the entire population. As long as the…

What do we use from a sample to draw co…

We take samples from a ______________

A statistic helps us build the ________…

X(bar) and P(hat) are good when they ar…

Statistic

Population distribution

Sampling distribution

centered; variability

What do we use from a sample to draw co…

Statistic

We take samples from a ______________

Population distribution

parameter (think "parameter" begins wit…

statistic (think "samle" begins with a…

sampling distribution of a statistic

biased

a number that describes some characteristic of the population…

a number that describes some characteristic of a sample (typic…

the distribution of values taken by the statistic in all possi…

not estimating the true center well

parameter (think "parameter" begins wit…

a number that describes some characteristic of the population…

statistic (think "samle" begins with a…

a number that describes some characteristic of a sample (typic…

parameter (p and p)

statistic (s and s)

sampling variability

sampling distribution of a statistic

a number that describes some characteristics of the population…

a number that describes some characteristic of a sample (x bar…

the value of a statistic varies in repeated random sampling -…

is the distribution of values taken by the statistic in all po…

parameter (p and p)

a number that describes some characteristics of the population…

statistic (s and s)

a number that describes some characteristic of a sample (x bar…

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 s…

,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.

Institutional Review Board

informed consent

confidential

anonymity

-The organization that carries out the study must have this th…

Type of consent a subject must give, usually in writing, befor…

-All individual data must be kept confidential. Only statistic…

When subjects names are not known even to the director of the…

Institutional Review Board

-The organization that carries out the study must have this th…

informed consent

Type of consent a subject must give, usually in writing, befor…

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

Alpha

Bias

Confidence interval

Confidence level

the probability of error, or the probability that a confidence…

a criterion used to select sample statistics as estimators. a…

an estimate of a population value in which a range of values i…

a frequently used alternate way of expressing alpha, the proba…

Alpha

the probability of error, or the probability that a confidence…

Bias

a criterion used to select sample statistics as estimators. a…

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

Determine whether the numerical value i…

Determine whether the numerical value i…

Determine whether the numerical value i…

Determine whether the numerical value i…

STATISTIC - the value $68,000 is a numerical description of a…

STATISTIC - the value of 38% is a numerical description of a S…

PARAMETER - the 62 surviving passengers out of 97 total passen…

PARAMETER - the value of 60% is a numerical description of the…

Determine whether the numerical value i…

STATISTIC - the value $68,000 is a numerical description of a…

Determine whether the numerical value i…

STATISTIC - the value of 38% is a numerical description of a S…

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 possi…

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…

Point Estimate

Confidence Interval

Confidence Level

Critical Value

A single value (or point) that is used to estimate a populatio…

A range of values used to estimate a population parameter.

The probability of 1- alpha, that the confidence interval actu…

The number on the borderline separating unlikely values from t…

Point Estimate

A single value (or point) that is used to estimate a populatio…

Confidence Interval

A range of values used to estimate a population parameter.

Parameter

Statistic

Sampling distribution

Unbiased Estimator

is a number that describes some characteristic of the populati…

is a number that describes some characteristic of a sample

the distribution of values taken by the statistics in all poss…

a statistic used to estimate the parameter is a ______ if the…

Parameter

is a number that describes some characteristic of the populati…

Statistic

is a number that describes some characteristic of a sample

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, t…

random variable

a numerical variable whose value is determined by the outcome…

discrete

can count, isolated points on number line

statistical inference

parameter

statistic

biased, wording, leading, ambiguous, in…

To obtain information about a population from information cont…

A numerical characteristic of a population

a numerical characteristic of a sample

Common sampling pitfalls are b______ samples, w________ of que…

statistical inference

To obtain information about a population from information cont…

parameter

A numerical characteristic of a population

Hypothesis test

Statistical hypothesis

Null hypothesis

Alternative hypothesis

A process that uses sample statistics to test a claim about th…

A statement, or a claim, about a population parameter

A statistical hypothesis that contains a statement of equality

The complement of the null hypothesis; a statement that must b…

Hypothesis test

A process that uses sample statistics to test a claim about th…

Statistical hypothesis

A statement, or a claim, about a population parameter

ethical

fake

wrong

institutional review board

The production and use of data like all human endeavors, raise…

few researches, in the pursuit of professional advancement, pu…

There is no ethical question here- faking data to advance your…

this decides if things are ethical to let the research go on.…

ethical

The production and use of data like all human endeavors, raise…

fake

few researches, in the pursuit of professional advancement, pu…

Scatterplots

Association

Outlier

Response variable, Explanatory variable…

A scatterplot shows the relationship between two quantitative…

Direction: A positive direction or association means that, in…

A point that does not fit the overall pattern seen in the scat…

In a scatterplot, you must choose a role for each variable. As…

Scatterplots

A scatterplot shows the relationship between two quantitative…

Association

Direction: A positive direction or association means that, in…

Problems with random sampling

3 random sampling plans

stratified random sampling

cluster sample

1) non-response... 2) under-coverage... 3) wording bias

1) stratified random sampling ... 2) cluster... 3) 1-in-k

selecting a simple random sample from each of a given number o…

when there is a bunch of people in 1 area

Problems with random sampling

1) non-response... 2) under-coverage... 3) wording bias

3 random sampling plans

1) stratified random sampling ... 2) cluster... 3) 1-in-k

assumptions

chi-square distribution

confidence interval

confidence level

techniques that must be met before valid conclusions can be ob…

a probability distribution obtained from the values of (n-1)s^…

a specific interval estimate of parameter determined by using…

the probability that a parameter lies within the specified int…

assumptions

techniques that must be met before valid conclusions can be ob…

chi-square distribution

a probability distribution obtained from the values of (n-1)s^…

Model

Normal Curve

Normally Distributed

Inflection Points

Anything that represents reality.

Bell shaped distribution.

A continuous random variable in which its relative frequency h…

The point at which the normal curve changes direction.

Model

Anything that represents reality.

Normal Curve

Bell shaped distribution.

Parameter

Statistics

Sampling Distribution

Unbiased Estimator

is a number that describes some characteristics of the populat…

is a number that describes some characteristics of the sample

is the distribution of values taken by the statistics in all p…

a statistic used to estimate a parameter , if the mean of its…

Parameter

is a number that describes some characteristics of the populat…

Statistics

is a number that describes some characteristics of the sample