Question: someone please help and show work so i can understand what is being done, thank you Question 1. The pH of 20 randomly selected lakes

someone please help and show work so i can understand what is being done, thank you

being done, thank you Question 1. The pH of 20 randomly selected

Question 1. The pH of 20 randomly selected lakes is measured. Their average ph is 5.7.Part B. For the 20 measured lakes the standard deviation in the pH values is 0.9. Use this standard deviation for the following questions. Part Bi. Build a 95% confidence interval for the population mean lake pH. Part Bii. Compare the confidence intervals in Bi and Ai. What effect does not knowing the value of a have on the interval? Part Biii. Test whether the population mean pH differs from 6

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