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#### Module Five Test Part Two Probability and Statistics Honors / Sampling Distributions ? Mckenna Smith 4

###### Statistics

Module Five Test Part Two Probability and Statistics Honors / Sampling Distributions ? Mckenna Smith 4. (05.04 HC) A program was created to randomly choose customers at a sporting goods store to receive a discount. The program claims 25% of the receipts will get a discount in the long run. The manager of the sporting goods store is skeptical and believes the program's calculations are incorrect. She selects a random sample and finds that 22% received the discount. The confidence interval is 0.22 + 0.04 with all conditions for inference met. Part A: Using the given confidence interval, is it statistically evident that the program is not working? Explain. (3 points) Part B: Is it statistically evident from the confidence interval that the program creates the discount with a 0.25 probability? Explain. (2 points) Part C: Another random sample of receipts is taken. This sample is four times the size of the original. Twenty-two percent of the receipts in the second sample received the discount. What is the value of margin of error based on the second sample with the same confidence level as the original interval? (2 points) Part D: Using the margin of error from the second sample in part C, is the program working as planned? Explain. (3 points) (10 points) B i U Font Family AA A D E. E. E part a SAVE &amp; EXIT SUBMIT ALL ANSWER 10:45 PM OCU