# Study sets matching "statistics chapter 3"

Study sets

Classes

Users

Response Variable

Explanatory Variable

Scatter Plots

How to make a scatterplot

Measures an outcome of a study

May help explain or predict changes in a response Variable

Shows the relationship between two quantitative variables meas…

1. Plot the explanatory variable (if there is one) on the hori…

Response Variable

Measures an outcome of a study

Explanatory Variable

May help explain or predict changes in a response Variable

Arithmetic Mean

Population Arithmetic Mean

Sample Arithmetic Mean

Mean

Computed by adding all the values of the variable in the data…

Computed using all the individuals in a population (a paramete…

Computed using sample data (a statistic)

The arithmetic mean

Arithmetic Mean

Computed by adding all the values of the variable in the data…

Population Arithmetic Mean

Computed using all the individuals in a population (a paramete…

measure of center

mean

median

mode

the central position of the data set; "typical" value in a dat…

average value; balancing point of a data set

middle value of a data set

most common value of a data set

measure of center

the central position of the data set; "typical" value in a dat…

mean

average value; balancing point of a data set

Bimodal distribution

First quartile

Interquartile Range

Lower inner fence

A distribution that has two modes

The value in a ranked data set such that about 25% of the meas…

The difference between the third and the first quartiles

A value in a data set that is 1.5(IQR) below the first quartile

Bimodal distribution

A distribution that has two modes

First quartile

The value in a ranked data set such that about 25% of the meas…

parameter

statistic

Bias

Variability

is a number that describes a population. A ____ is a fixed num…

is a number that describes a sample. The value of this is know…

is consistent, repeated deviation of the sample statistic from…

describes how spread out the values of the sample statistic ar…

parameter

is a number that describes a population. A ____ is a fixed num…

statistic

is a number that describes a sample. The value of this is know…

Measures of Center and Location

Parameter

As long as the population does not chan…

Statistic

Mean, Median, Mode, Weighted Mean

A measure computed from the entire population

The value of the parameter will not change

A measure computed from a sample that has been selected from a…

Measures of Center and Location

Mean, Median, Mode, Weighted Mean

Parameter

A measure computed from the entire population

Response variable

Explanatory variable

Scatterplots

When the variables aren't dependent, th…

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…

Independent, x

Response variable

Measures the outcome of a study, dependent variable, y

Explanatory variable

Attempts to explain observed outcomes, indepdent variable, x

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

Quantitative variables

Categorical variables

Response variable

Explanatory variable

Numerical values

Values expressed in categories

Measures the outcome of a study; dependent variable; y

Explains observed outcomes; independent variable; x

Quantitative variables

Numerical values

Categorical variables

Values expressed in categories

mean

average

standard deviation

variance

the arithmetic average

add all values up and divide by the number of values there are

a number that measures how far away the typical observation is…

the standard deviation squared

mean

the arithmetic average

average

add all values up and divide by the number of values there are

bimodal

boxplot

Chebyshev's Theorem

co-efficient of variation

a data set with 2 modes

a graph used to represent a data set when the data set contain…

theorem stating that the proportion of values from a data set…

standard deviation divided by the mean with the result express…

bimodal

a data set with 2 modes

boxplot

a graph used to represent a data set when the data set contain…

Sample mean

population mean

sample median

population median

the sum of the observation divided by n

the mean of the entire population

the middle value of the ordered data

the middle value of an entire population

Sample mean

the sum of the observation divided by n

population mean

the mean of the entire population

Average

Mode

Median

Sample mean, x

One number used to describe the entire sample or population

the value that occurs most frequently

The central value of an ordered distribution. If there is an e…

the sum of all values of entries in a sample population divide…

Average

One number used to describe the entire sample or population

Mode

the value that occurs most frequently

mode

median

mean

weighted average

value that occurs most frequently in a data set

central value of an ordered distribution

average of all the values in a data set

average with more importance assigned to some of the numbers.…

mode

value that occurs most frequently in a data set

median

central value of an ordered distribution

Skewness

Kurtosis

Mesokurtic

Leptokurtic

data that does not have normal distribution

the peakedness or flatness of a distribution of data

normal distribution

Which type of distribution is peaked

Skewness

data that does not have normal distribution

Kurtosis

the peakedness or flatness of a distribution of data

Median

Mode

Mean

Range

the value that lies in the middle of the data when arranged in…

the most frequent observation of the of the variable that occu…

average

the difference between the largest data value and the smallest

Median

the value that lies in the middle of the data when arranged in…

Mode

the most frequent observation of the of the variable that occu…

Response Variable

Explanatory Variable

Scatterplot

Positive Association

Measures an outcome of a study

Helps explain or influences changes in a response variable

A graphed cluster of points each of which represents the value…

Data points that generally go upward from left to right, somew…

Response Variable

Measures an outcome of a study

Explanatory Variable

Helps explain or influences changes in a response variable

___ ___ refers to the value around whic…

___ refers to the degree to which value…

___ ___ ___ refers to the particular wa…

The three key measures of central tende…

Central tendency

Variability

Shape of distribution

Mode, median, mean

___ ___ refers to the value around whic…

Central tendency

___ refers to the degree to which value…

Variability

Statistic

Parameter

Mean

The Sample Mean

A characteristic or measure obtained by using the data values…

A characteristic or measure obtained by using all the data val…

The sum of the values, divided by the total number of values.

Denoted by x̄ (pronounced X-bar) is calculated by using sample…

Statistic

A characteristic or measure obtained by using the data values…

Parameter

A characteristic or measure obtained by using all the data val…

Response Variable

Explanatory Variable

scatterplot

Interpreting scatterplots

measure the outcome of a study.

may help explain or influence changes in a response variable.

shows the relationship between two quantitative variables meas…

1) the direction ... 2) the form ... 3) the strength of the relation…

Response Variable

measure the outcome of a study.

Explanatory Variable

may help explain or influence changes in a response variable.

Parameter

population mean

sample mean

statistic

A characteristic of a population.

population mean = sum of all the values in the population / nu…

"x bar"... sample mean = sum of all the values in the sample / nu…

A characteristic of a sample.

Parameter

A characteristic of a population.

population mean

population mean = sum of all the values in the population / nu…