(D) Based on the confidence interval, do you believe the claim that the true mean daily gross sales is 200 thousand dollars? Explain. (E) Would a smaller margin of error result from a smaller or larger confidence level? (F) Suppose the population standard deviation were known to be 120. (i) Find a 95% confidence interval for the true mean daily gross sales for all small businesses. (ii) How many small businesses should be sampled to obtain a 99% confidence level with the same interval width?

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