Fiona recorded the number of miles she biked each day last week as shown below. 4, 7, 4, 10, 5 The mean is given by m = 6. Which equation shows the variance for the number of miles Fiona biked last week?

Question

Madalynn Hancock

Mathematics

30 November, 03:24

Fiona recorded the number of miles she biked each day last week as shown below. 4, 7, 4, 10, 5 The mean is given by m = 6. Which equation shows the variance for the number of miles Fiona biked last week?

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Answers (1)

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Ronnie Haas · Answer 1

Given that the mean of the equation is given by:

m=6

the variance is given by the formula:

[∑ (x-m) ²] / (n-1)

∑ (x-m) ²=[ (4-6) ² + (7-6) ² + (4-6) ² + (10-6) ² + (5-6) ²]=26

hence the expression will be:

26 / (n-1)

where n=5, the number of times she ran