Chang wants to find the average height of students in the grade at East High School. So he will use a sample of students in the grade to find the average height.

Question

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 students from the grade and have them state their own heights.

Randomly pick students from the grade and measure their heights.

Measure the heights of volunteers from the grade.

Ask for volunteers from the grade to state their own heights.

Answer 1

(a) The unit(s) that could be used for the unit of measurement when measuring height are:

• inches
• feet
• centimeters

(b) The best procedure to find the average height would be:

• Randomly pick students from the grade and measure their heights.

This method ensures a more accurate and unbiased representation of the entire population rather than relying on self-reported data or volunteers, which may result in skewed results.