Question

lisa wants to find the average height of students in the 12th grade at west high school. so she will use the heights of 3students in the 12th 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.□ feet □ pounds □ ounces □ centimeters □ kilograms(b) which of the procedures below would be the best way to find the average height?□ randomly pick 35 students from the 12th grade and measure their heights.□ randomly pick 35 students from the 12th grade and have them state their own heights.□ ask for 35 volunteers from the 12th grade to state their own heights.□ measure the heights of 35 volunteers from the 12th grade.

Explanation:

Part (a)

• Feet: A unit of length, suitable for measuring height.
• Centimeters: A unit of length, also suitable for measuring height.
• Pounds: A unit of weight, not for height.
• Ounces: A unit of weight, not for height.
• Kilograms: A unit of mass, not for height.

Part (b)

• Randomly picking 35 students and measuring their heights (not just having them state) gives the most accurate data. Measuring is more reliable than self - reporting (students might not know or might exaggerate). Also, random selection is better than volunteer selection as volunteers might not be representative (e.g., only taller or more interested students might volunteer).

Answer:

(a)

• feet
• centimeters

(b)

Randomly pick 35 students from the \(12^{th}\) grade and measure their heights.