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Please do Question 3 and 4 based on how I did question 2. I pasted the question #2 and my work. R: simple random sample

Please do Question 3 and 4 based on how I did

question 2. I pasted the question #2 and my work. R: simple random sample of 40

N: N is greater than 30

and I am not sure about the Independent part

Part B please do the SD and the Normal CDF way I did for question 2

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