Question

scott 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. kilograms seconds milligrams minutes grams (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)

Step1: Analyze units

Units for time are seconds and minutes. Kilograms, milligrams, grams are units of mass.

(b)

Step1: Consider sampling bias

Volunteers may not be representative (e.g., more athletic). Measuring times (instead of relying on self - reported) is more accurate. Randomly picking students gives a more representative sample.

Answer:

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