For this exercise use the Student2010 dataset on the companion website. The variable Use Cell gives student responses to a question that asked students how they mainly used a cell phone (to talk, to text).
a. Create a two-way table that summarizes the relationship between Sex and Use Cell.
b. Fill in the following table with row percentages.
|
UseCell
|
|
Sex
|
To Talk
|
To Text
|
Total
|
|
Female
|
|
|
|
|
Male
|
|
|
|
c. Explain why the percentages found in part (b) are evidence that Sex and Use Cell are related in the sample.
d. Write null and alternative hypotheses about the possible relationship between Sex and Use Cell.
e. What is the p-value of a chi-square test of statistical significance for the relationship between Sex and Use Cell? Is the observed relationship statistically significant?