Question

A middle school student studies the amount of time 7th and 8th graders spend playing video games on the weekend by collecting data from a large random sample of students in each grade. Her theory is that 7th graders will spend more time playing video games because 8th graders have more difficult classes and must spend more time on school work. In her samples, the mean time spent playing video games on the weekend is 122.4 minutes for 7th graders and 88.6 minutes for 8th graders. Assuming there are no outliers or skew, do the results support the student's theory? Select from the drop-down menus to correctly complete the statements. Since the samples were large and randomly chosen, we can use the samples to understand the populations. Because the sample mean for 7th graders is the sample mean for 8th graders, the results support the student's theory.

Answer 1

Because the sample mean for seventh graders is

larger than

the sample mean for eighth graders, the results

tend to

support the student's theory.

Answer 2

The correct answers are:

Since the samples were large and randomly chosen, we can use the samples to understand the populations.

Because the sample mean for 7th graders is LARGER THAN the sample mean for 8th graders, the results TEND TO support the student's theory.