Thread: Testing Hypothesis

The following table gives the observed and expected frequencies in tossing a dice 120 times. For testing the hypothesis that the dice is fair , one is required to compute
Find the value.

Originally Posted by zorro

The following table gives the observed and expected frequencies in tossing a dice 120 times. For testing the hypothesis that the dice is fair , one is required to compute
Find the value.

First compute the expected frequencies under the hypothesis



Now look up the test equations.

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Originally Posted by Constatine11

First compute the expected frequencies under the hypothesis



Now look up the test equations.

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Hw did u get Expected frequency as 20

isnt E[x] = x f(x) = 7/2

Originally Posted by zorro

Hw did u get Expected frequency as 20

isnt E[x] = x f(x) = 7/2

There are 120 throws and 6 equally likely outcomes, hence the expected frequency of each outcome is 120/6=20.
This is the expected number of 1, 2, .. 6's in 120 throws.


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