Question

What is the mean of the gien data set

Answer 1

81.75

Explanation:

To calculate mean, we have to add the sum of all data points, and divide by the number of data points.

62+69+74+74+78+81+83+88+88+92+93+99=981

Now, we know there are 12 data points. So, we divide these:

981 / 12 = 81.75

The mean is 81.75.

Answer 2

C) 81.75

Explanation:

A stem-and-leaf plot is a method of organizing and displaying data by separating each number into its leading digits (stem) and trailing digit (leaf).

Therefore, the 12 data values displayed in the given stem-and-leaf plot are:

`\sf 62, 69, 74, 74, 78, 81, 83, 88, 88, 92, 93, 99`

To find the mean of a data set, sum all the individual data values and then divide by the number of data values:

Therefore, the mean of the given data set is:

`\sf Mean=(62+69+74+74+78+81+83+88+88+92+93+99)/(12)`

`\sf Mean=(981)/(12)`

`\sf Mean=81.75`