Problem
Lamar wants to find the average height of students in the $10^{\text {th }}$ grade at West High School. So he will use a sample of students in the $10^{\text {th }}$ grade to find the average height. Answer the questions below. (a) Which unit(s) could be used for the unit of measurement? Check all that apply. inches feet pounds kilograms centimeters (b) Which of the procedures below would be the best way to find the average height? Randomly pick 3 students from the $10^{\text {th }}$ grade and have them state their own heights. Randomly pick 35 students from the $10^{\text {th }}$ grade and measure their heights. Measure the heights of 3 volunteers from the $10^{\text {th }}$ grade. Ask for 35 volunteers from the $10^{\text {th }}$ grade to state their own heights.
Solution
Step 1 ：Lamar wants to find the average height of students in the 10th grade at West High School. He will use a sample of students in the 10th grade to find the average height.
Step 2 ：(a) The units that could be used for the unit of measurement are inches, feet, and centimeters.
Step 3 ：(b) The best way to find the average height would be to randomly pick 35 students from the 10th grade and measure their heights.
Step 4 ：Final Answer: The units that could be used for the unit of measurement are \(\boxed{\text{inches, feet, and centimeters}}\).
Step 5 ：Final Answer: The best way to find the average height would be to randomly pick 35 students from the 10th grade and measure their heights.
