Question: For the following Hypothesis Tests below : (a) State the null hypothesis, if not given. (b) State the decision rule. (c) Compute the value of

For the following Hypothesis Tests below :

(a) State the null hypothesis, if not given.

(b) State the decision rule.

(d) Is H0 accepted or rejected?

(e) Conclusion.

Exercise 6: A stockholder at Critical Securities reported that the mean rate of return on a sample of 10 oil stocks was 12.6 percent with a standard deviation of 3.9 percent.The mean rate of return on a sample of 8 utility stocks was 10.9 percent with a standard deviation of 3.5 percent.A the .05 significance level, can we conclude that the variations are different?

(a)Ho:

(b)Reject H_o when

(c)F =

(d)Ho is

(e)

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