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exam 2

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  • paired t-test

    did something change within the same group?

    ex. before vs. after

  • 2 - sample t-test (Means)

    are the averages of 2 groups different?

    ex. do males have a higher salary than females

  • 2 - sample t-test (Proportions)

    are the percentages of 2 groups different?

    ex. conversation rate A vs. rate B

  • one way ANOVA

    are any of the group's averages different?

    ex. salary across different departments

  • chi-square test for Independence

    are the two categorical variables related?

    ex. gender vs. department

  • chi-square test for Goodness of Fit

    does the observed distribution match what is expected?

    ex. obs counts vs. exp counts

  • simple linear regression

    is there a relationship between 2 numerical variables?

    ex. salary vs. performance score