In order to estimate the typical amount of TV watched per day by students at her school of 1,000 students, a student has all of the students in her statistics class (30 students) take a short survey, finding that, on average, students in her statistics class report watching 1.2 hours of television per day.

In the survey the student also asked students whether or not they watched at least 10 minutes of TV yesterday. The student found that 21 of 30 students reported watching at least 10 minutes of TV yesterday.

Among the students in her class, the information for three particular students is given here:

1. Alejandra reported watching 2 hours of TV a day, but not watching TV yesterday.
2. Ben reported watching 4 hours of TV a day and watching TV yesterday.
3. Cassie reported watching 30 minutes of TV a day and not watching TV yesterday.

Use this information to fill in the blank data table below, where the last row (...) indicates that additional informationis present in the real data table since there were actually 30 students in the survey. Be sure to provide appropriate labels/headings for each of the three columns (12 squares in total).

Consider how the student obtained her sample for her study. If her study was conducted by taking a random sample, explain (in enough detail that someone could follow your directions to obtain the sample) how it could have been done. If her study was not conducted by taking a random sample, explain how you could modify the study design to make it be a random sample, and explain (in enough detail that someone could follow your directions to obtain the sample) how it could have been done.