Question: To test H0: = 1.2 versus H1: 1.2, a random sample of size n = 22 is obtained from a population that

To test H0: σ = 1.2 versus H1: σ ≠ 1.2, a random sample of size n = 22 is obtained from a population that is known to be normally distributed.

(a) If the sample standard deviation is determined to be s = 0.8, compute the test statistic.

(b) If the researcher decides to test this hypothesis at the a = 0.10 level of significance, determine the critical values.

(c) Draw a chi-square distribution and depict the critical regions.

(d) Will the researcher reject the null hypothesis? Why?

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