Question

charlie wants to find the average time it takes east high school students to run a lap around the track. so he will consider 32 students to find the average time. answer the questions below. (a) which unit(s) could be used for the unit of measurement? check all that apply. □ minutes □ inches □ centimeters □ hours □ feet (b) which of the procedures below would be the best way to find the average time? ○ randomly pick 32 students to run a lap around the track and measure their times. ○ randomly pick 32 students to run a lap around the track and have them state their own times. ○ ask for 32 volunteers to run a lap around the track and have them state their own times. ○ measure the times of 32 volunteers who run a lap around the track.

Explanation:

(a) We need units for measuring time; minutes and hours are time units, while the others are length units.
(b) To get an accurate average for East High students, we need a random sample of the target group (students) and objective measurement of their times, not self-reporting or using non-student volunteers.

Answer:

(a)
☑ minutes
☐ inches
☐ centimeters
☑ hours
☐ feet

(b)
☑ Randomly pick 32 students to run a lap around the track and measure their times.
☐ Randomly pick 32 students to run a lap around the track and have them state their own times.
☐ Ask for 32 volunteers to run a lap around the track and have them state their own times.
☐ Measure the times of 32 volunteers who run a lap around the track.