Question

A dance club ordered shoes for all of its members. The shoe sizes are shown in the table.

Shoe sizes

8 | 8.5 | 6 | 6 | 6.5

7 | 7 | 7.5 | 9 | 9.5

6 | 10 | 5 | 6 | 5.5

8 | 7 | 7.5 | 7 | 8.5

6.5| 6 | 8 | 7 | 9

Ten members of the dance club were selected for a special performance. The shoe sizes are shown in the table.

Shoe sizes

7 | 7 | 10 | 6 | 9

6 | 8 | 7.5 | 8.5| 8

What is the sample mean for the data?

Enter your answer, as a decimal, in the box.

x?????? =

Answer 1

The sample mean of the data is:

7.7

Explanation:

The sample mean is the sum of all sample observations divided by the number of sample observations.

Let sample mean=x

x=(7 +7 +10 +6 +9 +6 +8 +7.5 +8.5 +8)/10

x= 77/10

x= 7.7

Hence, the sample mean of the data is:

x=7.7

Answer 2

The sample mean is the sum of the sample values divided by the number of them:
(7 +7 +10 +6 +9 +6 +8 +7.5 +8.5 +8)/10 = 77/10 = 7.7

The sample mean is 7.7.