Question

Rafael wants to find the average time it takes Central High School students to run a lap around the track. So he will consider 55 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.
seconds Omilligrams 0 minutes
kilograms
grams
(b) Which of the procedures below would be the best way to find the average time?
O Randomly pick 55 students to run a lap around the track and measure their times.
O Randomly pick 55 students to run a lap around the track and have them state their own times.
O Ask for 55 volunteers to run a lap around the track and have them state their own times.
O Measure the times of 55 volunteers who run a lap around the track.

Answer 1

Seconds and Minutes

Explanation:

Randomly pick 55 students to run a lap around the track and measure their time.

This is the only option that avoids any type of bias.