Question: ) Scores on an IQ test are normally distributed. A sample of 20 IQ scores had standard deviation s = 8. The developer of

) Scores on an IQ test are normally distributed. A sample of

) Scores on an IQ test are normally distributed. A sample of 20 IQ scores had standard deviation s = 8. The developer of the test claims that the population standard deviation is 1 = 12. Do these data provide sufficient evidence to contradict this claim? Use the != 0.05 level of significance. 3) A) Reject HO. The population standard deviation appears to differ from 12. B) Do not reject HO. There is insufficient evidence to conclude that the population standard deviation differs from 12.

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