Question: To test H0: = 1.8 versus H1: 7 1.8, a random sample of size n = 18 is obtained from a population that

To test H0: σ = 1.8 versus H1: σ 7 1.8, a random sample of size n = 18 is obtained from a population that is known to be normally distributed.
(a) If the sample standard deviation is determined to be s = 2.4, compute the test statistic.
(b) If the researcher decides to test this hypothesis at the a = 0.10 level of significance,
determine the critical value.
(c) Draw a chi-square and depict the critical region.
(d) Will the researcher reject the null hypothesis? Why?

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