### Home > CC3MN > Chapter 8 > Lesson 8.1.1 > Problem8-11

8-11.

The school counselors are worried about the study habits of students who are involved in a lot of after-school activities. They randomly selected students at the school and gathered the following data. Consider the number of activities the independent variable.

 # OF STUDENTS Hours Spent Studying Per Week Hours of After-School Activities Per Week Less Than $\mathbf{8}$ Hours Eight or More Hours Less Than $\mathbf{5}$ Hours # of students with less than 5 hours of after school activities per week and study less than 8 hours per week:  $29$ # of students with less than 5 hours of after school activities per week and studies 8 or more hours of per week: $19$ Five or More Hours # of students with 5 or more hours of after school activities per week and studies less than 8 hours per week: $14$ # of students with 5 or more hours of after school activities per week and studies 8 or more hours per week: $36$
1. Make a conditional relative frequency table.

What is the total number of hours in each row? What is the percentage of this total for each column?
Use this information to make your table.

2. Is there an association between the amount of time spent studying and number of after-school activities?

• There is an association, but is it the association you would expect?