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 How would you describe the mode?

Answer 1

Mode = 7,8

Explanation:

We are given the following data set:

8, 7, 5, 7, 4, 7, 6, 7, 8, 8, 8, 6

This is the data for number of hours slept the preceeding night.

We have to find the mode of the data.

It is described as the most frequent observation in the sample.

Sorted Data:

4, 5, 6, 6, 7, 7, 7, 7, 8, 8, 8, 8

Both observation 8 and 7 repeated 4 times each.

Thus, the mode of data is 7 and 8.

Thus, it is a bi-modal data.

7 hours and 8 hours are the most frequent number of hours of sleep preceeding night.