The Bank of Delmarva has branches in Dover and Baltimore. The bank uses a standard credit- rating system. Dover: n=40, sample mean =43.7, and sample standard deviation =16.2. Baltimore: n=60, sample mean =48.2, and sample standard deviation =16.5. (a) At the 0.05 significance level, test the claim that both populations have the same mean. Original claim is made by 0. Test statistic: Critical value: P-value: Initial conclusion: the null hypothesis. Final conclusion enough evidence to warrant the rejection of the claim. (b) Construct a 95% confidence interval for the difference between the two proportions. < Mean Dover Mean Baltimore<.

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