Question

Sabine records the daily heights of a random sample of bamboo stalks, in inches. They are:    20, 19, 17, 16, 18, 15, 20, 21 Consider the formulas: fomulas for the variance and standard deviation Which formula should you use for variance? Which formula should you use for standard deviation?

Answer 1

Which formula should you use for variance? (A)

Which formula should you use for standard deviation? (B)

The mean of the data is 18.25. Find the variance. (4.5)

Find the standard deviation. (2.12)

Answer 2

formula for standard deviation is equation A

for standard deviation you would use equation B