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In testing a claim that the three different samples have the same mean, following sample results...

In testing a claim that the three different samples have the same mean, following sample results have been obtained:

Sample 1

Sample 2

Sample 3

  = 6

  =  6

= 6

= 19

= 20

= 18

= 3

= 4

= 5

Find the variance within the samples i.e.  ?

(Roundoff the answer to two decimal digits)

Math   Statistics-And-Probability   
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Answer #1

There are 3 samples here, we first compute the mean for each sample here as:

Therefore, the variation within samples now is computed here as:

Therefore 401.33 is the required variance here.

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