Question

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

Explanation:

(a) We need units for measuring time; hours and seconds are time units, while the others are length units. Hours are too large for a lap run time, so seconds is appropriate, and hours could technically be used but seconds is practical.
(b) To get accurate average time for Lincoln High students, we need a random sample of students and measured (self-reported times are unreliable) data.

Answer:

(a) hours, seconds
(b) Randomly pick 24 students to run a lap around the track and measure their times.