To test H0: = 4.3 versus H1: 4.3, a random sample of size n

Question:

To test H0: σ = 4.3 versus H1: σ ≠ 4.3, a random sample of size n = 12 is obtained from a population that is known to be normally distributed.

(a) If the sample standard deviation is determined to be s = 4.8, compute the test statistic.

(b)If the researcher decides to test this hypothesis at the a = 0.05 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?

Distribution
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