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24 December, 16:48

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? =

+2
Answers (1)
  1. 24 December, 17:09
    0
    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.
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