Question: Scores on an IQ test are normally distributed. A sample of 25 IQ scores had standard deviation s = 9. The developer of the test

Scores on an IQ test are normally distributed. A sample of 25 IQ scores had standard deviation s = 9. The developer of the test claims that the population standard deviation is = 17. Do these data provide sufficient evidence to contradict this claim? Use the = 0.05 level of significance. 11)

A) Do not reject H0 . There is insufficient evidence to conclude that the population standard deviation differs from 17.

B) Reject H0 .

The population standard deviation appears to differ from 17.

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