Question

hans wants to find the average time it takes northside high school students to run a lap around the track. so he will consider 24 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 millimeters centimeters hours meters (b) which of the procedures below would be the best way to find the average time? measure the times of 24 volunteers who run a lap around the track. ask for 24 volunteers to run a lap around the track and have them state their own times. randomly pick 24 students to run a lap around the track and have them state their own times. randomly pick 24 students to run a lap around the track and measure their times.

Explanation:

(a) We need units for measuring time; minutes and hours are time units, while the others are length units. Minutes are the most practical for a lap time, and hours could technically be used for very slow times.
(b) To get accurate, unbiased average time, we need a random sample and direct measurement (self-reported times are prone to inaccuracy, volunteers may not represent the student body).

Answer:

(a)

• minutes
• hours

(b)

• Randomly pick 24 students to run a lap around the track and measure their times.