- Using a numerical response variable and a two-level categorical variable (or a categorical variable you can reduce to two levels), specify a
**two-sample \(t\)-test**associated with your research questions.- (1 p) Indicate the two variables, their definitions (the questions from the codebook that defines their data), and a
`summary()`

of each variable. - (2 p) Specify the hypotheses in words and notation (either one- or two-sided test).
- (0 p) Use
`t.test()`

to calculate the mean, test statistic, and p-value. - (3 p) State the significance level, test statistic, and p-value.
- (2 p) State the conclusion in the context of the problem.
- (2 p) Provide an appropriate plot of the data and sample estimates in a well-labelled plot.

- (1 p) Indicate the two variables, their definitions (the questions from the codebook that defines their data), and a

Turn in your project file with these answers in the Class 18 Section.

The sections from Erikโs `S4R_Project_All_Erik_NESARC.Rmd`

file to focus on are

- Class 18 Hypothesis Testing