Standard Deviation and Variance Empirical Rule

Use the following information and the Empirical Rule to estimate the answer.

The ages of golfers are normally distributed, with a mean of 38 and a standard deviation of 4.

There are 500 golf members at the Mathy Country Club. How many are younger than 34?

• 16

• 80

• 100

• 150

Find the standard deviation of the following

2, 5, 5, 8, 11, 12

to 3 s.f.

Find the variance of the following

2, 5, 5, 8, 11, 12

to 3 s.f.

Find the standard deviation of the following

2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2

Find the variance of the following

2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2

Find the standard deviation of the following
7, 8, 10, 10, 11, 12, 13, 14, 14, 14
to 3 s.f.

Find the variance of the following

7, 8, 10, 10, 11, 12, 13, 14, 14, 14

to 3 s.f.

Find the variance of the following 1.1, 1.12, 1.3, 1.37, 1.44, 1.45 to 3 s.f.

Find the standard deviation of the following to 3 s.f.

Find the standard deviation of the following

to 3 s.f.