(Answered) Question a sample of 18 observations selected from a

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Question: A sample of 18 observations selected from a normally distributed population produced a sample variance of 4.6.

a. Write the null and alternative hypotheses to test whether the population variance is different from 2.2.

b. Using α = .05, find the critical values of χ². Show the rejection and nonrejection regions on a chi-square distribution curve.

c. Find the value of the test statistic χ².

d. Using the 5% significance level, will you reject the null hypothesis stated in part a?

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