Question: Scores on an IQ test are normally distributed. A sample of 25 IQ scores had standard deviation =s8. The developer of the test claims that

Scores on an IQ test are normally distributed. A sample of 25 IQ scores had standard deviation =s8. The developer of the test claims that the population standard deviation is =22 Do these data provide sufficient evidence to contradict this claim? Use the = 0.10 level of significance.

State the null and alternate hypotheses.
Choose a significance level and find the critical value.
Compute the test statistic.
Determine whether to reject H0
State a conclusion.

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