Study sets matching "ap statistics moore"
Study sets
Diagrams
Classes
Users
Point Estimate
Confidence Interval
Confidence Interval (two parts)
Confidence Level C
To estimate an unknown population parameter, start with a stat…
A (confidence Interval) use sample data to estimate an unknown…
1. Interval computed from the data ... 2. Confidence Level C.
The (confidence Level C), is the success rate of the method th…
Point Estimate
To estimate an unknown population parameter, start with a stat…
Confidence Interval
A (confidence Interval) use sample data to estimate an unknown…
5 number summary
z score
standard deviation
population
The minumum value, lower quartile, median, upper quartile, and…
a measure of how many standard deviations you are away from th…
A statistical measure of how far away each value is, on averag…
(statistics) the entire aggregation of items from which sample…
5 number summary
The minumum value, lower quartile, median, upper quartile, and…
z score
a measure of how many standard deviations you are away from th…
5 number summary
z score
standard deviation
population
The minumum value, lower quartile, median, upper quartile, and…
a measure of how many standard deviations you are away from th…
A statistical measure of how far away each value is, on averag…
(statistics) the entire aggregation of items from which sample…
5 number summary
The minumum value, lower quartile, median, upper quartile, and…
z score
a measure of how many standard deviations you are away from th…
How do you check if there is outliers?
If a graph is skewed, should we calcula…
If a graph is roughly symmetrical, shou…
What is in the five number summary?
calculate IQR; anything above Q3+1.5(IQR) or below Q1-1.5(IQR)…
median; it is resistant to skews and outliers
mean; generally is more accurate if the data has no outliers
Minimum, Q1, Median, Q3, Maximum
How do you check if there is outliers?
calculate IQR; anything above Q3+1.5(IQR) or below Q1-1.5(IQR)…
If a graph is skewed, should we calcula…
median; it is resistant to skews and outliers
How do you check if there is outliers?
If a graph is skewed, should we calcula…
If a graph is roughly symmetrical, shou…
What is in the five number summary?
calculate IQR; anything above Q3+1.5(IQR) or below Q1-1.5(IQR)…
median; it is resistant to skews and outliers
mean; generally is more accurate if the data has no outliers
Minimum, Q1, Median, Q3, Maximum
How do you check if there is outliers?
calculate IQR; anything above Q3+1.5(IQR) or below Q1-1.5(IQR)…
If a graph is skewed, should we calcula…
median; it is resistant to skews and outliers
context
data
data table
variable
ideally tells who was measured, what was measured, how the dat…
systematically recorded information, whether numbers or labels…
an arrangement of data in which each row represents a case and…
holds information about the same characteristic for many cases
context
ideally tells who was measured, what was measured, how the dat…
data
systematically recorded information, whether numbers or labels…
5 number summary
z score
standard deviation
population
The minumum value, lower quartile, median, upper quartile, and…
a measure of how many standard deviations you are away from th…
A statistical measure of how far away each value is, on averag…
(statistics) the entire aggregation of items from which sample…
5 number summary
The minumum value, lower quartile, median, upper quartile, and…
z score
a measure of how many standard deviations you are away from th…
context
data
data table
case
ideally tells who was measured, what was measured, how the dat…
systematically recorded information, whether numbers or labels…
an arrangement of data in which each row represents a case and…
an individual about whom or which we have data
context
ideally tells who was measured, what was measured, how the dat…
data
systematically recorded information, whether numbers or labels…
categorical data
continuous data
data
data collection
Data are categorical if they are in the form of names or label…
Measured data that can be whole numbers, fractions, or decimal…
The plural form of the word datum. A collection of pieces of i…
Gathering information for selected population members through…
categorical data
Data are categorical if they are in the form of names or label…
continuous data
Measured data that can be whole numbers, fractions, or decimal…
context
data
data table
variable
ideally tells who was measured, what was measured, how the dat…
systematically recorded information, whether numbers or labels…
an arrangement of data in which each row represents a case and…
holds information about the same characteristic for many cases
context
ideally tells who was measured, what was measured, how the dat…
data
systematically recorded information, whether numbers or labels…
Individuals
Variable
Categorical Variable
Quantitative Variables
The objects described by a set of data. Can be people, animals…
Any characteristic of an individual.
Type of variable that places an individual into one of several…
Type of variable that takes numerical values for which it make…
Individuals
The objects described by a set of data. Can be people, animals…
Variable
Any characteristic of an individual.
Categorical vs. Quantitative Data
Marginal vs. Conditional Distributions
SOCS
Comparing... Distributions
Data are categorical if they fall into groups or... categories a…
In a two-way table, marginal distributions consider... only one…
Shape - Skewed Left, Skewed Right, Symmetric,... Uniform, Unimod…
Address: Shape, Outliers, Center, Spread... in context!... YOU MUS…
Categorical vs. Quantitative Data
Data are categorical if they fall into groups or... categories a…
Marginal vs. Conditional Distributions
In a two-way table, marginal distributions consider... only one…
5 number summary
z score
standard deviation
population
The minumum value, lower quartile, median, upper quartile, and…
a measure of how many standard deviations you are away from th…
A statistical measure of how far away each value is, on averag…
(statistics) the entire aggregation of items from which sample…
5 number summary
The minumum value, lower quartile, median, upper quartile, and…
z score
a measure of how many standard deviations you are away from th…
5 number summary
z score
standard deviation
population
The minumum value, lower quartile, median, upper quartile, and…
a measure of how many standard deviations you are away from th…
A statistical measure of how far away each value is, on averag…
(statistics) the entire aggregation of items from which sample…
5 number summary
The minumum value, lower quartile, median, upper quartile, and…
z score
a measure of how many standard deviations you are away from th…
How do you check if there is outliers?
If a graph is skewed, should we calcula…
If a graph is roughly symmetrical, shou…
What is in the five number summary?
calculate IQR; anything above Q3+1.5(IQR) or below Q1-1.5(IQR)…
median; it is resistant to skews and outliers
mean; generally is more accurate if the data has no outliers
Minimum, Q1, Median, Q3, Maximum
How do you check if there is outliers?
calculate IQR; anything above Q3+1.5(IQR) or below Q1-1.5(IQR)…
If a graph is skewed, should we calcula…
median; it is resistant to skews and outliers
Bias
Census
Cluster sample
Convenience sample
The design of a statistical study shows bias if it would consi…
A study that attempts to collect data from every individual in…
To take a cluster sample, first divide the population into sma…
A sample selected by taking the members of the population that…
Bias
The design of a statistical study shows bias if it would consi…
Census
A study that attempts to collect data from every individual in…
Percentile
Frequency Graph
Relative Frequency Graph
Cumulative Relative Frequency Graph
The pth percentile of a distribution is the value with p perce…
A graph showing the counts of each class in a distribution.
A graph showing the percent values of each class from the whol…
The cumulative relative frequency of successive class is the r…
Percentile
The pth percentile of a distribution is the value with p perce…
Frequency Graph
A graph showing the counts of each class in a distribution.
Significance Test
Null Hypothesis
Alternative Hypthesis
One-Sided
A formal procedure for using observed data to decide between t…
Claim we weigh evidence against in a significance test
The claim that we are trying to find evidence for in a signifi…
It states that a parameter is larger than the null hypothesis…
Significance Test
A formal procedure for using observed data to decide between t…
Null Hypothesis
Claim we weigh evidence against in a significance test
Variables
Categorical Variable
Quantitative Variable
Frequency Table
Characteristic of an individual
Places individual into a category
Takes numerical values for which it makes sense to find an ave…
Table of counts
Variables
Characteristic of an individual
Categorical Variable
Places individual into a category
Symmetric
Parameter
Statistic
Median
data on which both sides are fairly the same shape and size. "…
value of a population (typically unknown)
a calculated value about a population from a sample(s).
the middle point of the data (50th percentile) when the data i…
Symmetric
data on which both sides are fairly the same shape and size. "…
Parameter
value of a population (typically unknown)
Conditions for Bernoulli Trials
Geometric probability model
Mean & Standard Deviation of Geometic m…
Binomial probability model
1. There are two possible outcomes (success and failure).... 2. t…
- Tells us the probability for a random variable that counts t…
Mean = 1/p... SD = sqrt(q)/p
- Tells us the probabilty for a random variable that counts th…
Conditions for Bernoulli Trials
1. There are two possible outcomes (success and failure).... 2. t…
Geometric probability model
- Tells us the probability for a random variable that counts t…
Response variable
Explanatory variable
Scatterplots
Positive association
Measures the outcome of a study, dependent variable, y
Attempts to explain observed outcomes, indepdent variable, x
Show the relationship betweeen two quantitive variables (bivar…
As x increases, y increases
Response variable
Measures the outcome of a study, dependent variable, y
Explanatory variable
Attempts to explain observed outcomes, indepdent variable, x
Parameter
Statistic
Convenience Sample
Voluntary Response Sample
A calculation made from population data
A calculation made from sample data
Uses subjects that are readily available (no randomization)
Subjects choose to be part of the sample (no randomization)
Parameter
A calculation made from population data
Statistic
A calculation made from sample data