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A sample was taken of the salaries of four employees from a large company. The following are their salaries (in thousands of dollars) for this year. 33 31 24 36 The variance of their salaries is_____.a.5.1. b.31. c.26.

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pedrocarratore

Answer:

c.26

Step-by-step explanation:

The mean salary of the sample is:

[tex]M=\frac{33+31+24+36}{4}\\M=31[/tex]

The variance of a sample is given by:

[tex]V = \frac{\sum(x_i-M)^2}{n-1}\\V = \frac{(33-31)^2+(31-31)^2+(24-31)^2+(36-31)^2}{4-1}\\ V=26[/tex]

The variance of their salaries is 26.

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