Question

As part of the National Health and Nutrition Examination Survey, subjects were asked how long they slept the preceding night, and the following times (hours) were reported: 8, 7, 5, 7, 4, 7, 6, 7, 8, 8, 8, 6

The standard deviation is 1.3 hours.
What is the variance?

Answer 1

The variance for the given data is 1.69 hours squared.

Step-by-step explanation:

To find the variance, we need to square the standard deviation. The standard deviation is given as 1.3 hours, so when we square it, we get 1.69 hours squared. Therefore, the variance for the given data is 1.69 hours squared.

Answer 2

Variance = 1.69 hours

Step-by-step explanation:

The variance of the following number of set is the square of its standard deviation.

Therefore, variance = S.D * S.D