cross tabs, mean, variance, 5 number summary

# cross tabs, mean, variance, 5 number summary - Cross Tabs...

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Cross Tabs : Is a summary of information from 2 variables. Sometimes they are called Contingency Tables. Important Definitions: Joint Distribution: how the 2 variables are distributed together Marginal Distribution: how 1 variable is distributed without accounting for the other variable Conditional Distribution: how the 1 variable is distributed given a particular value of the other variable Example: Happy Not Happy In class 2 48 At Home 40 10 What is the first thing you should do in a cross-tab situation (if it is not already provided)? Example of joint, marginal, and conditional:

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Section 3.1 Sample Statistics - numerical measures of location, dispersion, shape, and association computed for data FROM A SAMPLE Population parameters- numerical measures of location, dispersion, shape, and association computed for data FROM A POPULATION Note: most of the time, we will just say statistic or parameter. Keep in mind statistics are always from the sample and parameters are always from the population. In addition, sometimes, statistics are referred to as
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cross tabs, mean, variance, 5 number summary - Cross Tabs...

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