QUESTION 8 Suppose you have a sample of data, where X 20 s-4 n 36 Suppose you wa

Question

QUESTION 8 Suppose you have a sample of data, where X 20 s-4 n 36 Suppose you want to create a confidence interval for the mean where ? -0.01 What is the margin of error used for the confidence interval? (Give 3 decmials) QUESTION 9 Suppose you have a sample of data, whre X20,s-4n-36. Suppose you want to create a confidence interval for the mean, where a 0.01 What is the lower bound for the confidence interval? (Give 3 decimals) QUESTION 10 Suppose you have a sample of data, where X - 20,s4 n-36 Suppose you want to create a confidenchanterval for the mean, where a What is the upper bound for the confidence interval? (Give 3 decmials) 0.01 QUESTION 11 you have a sample of data, where X -20 and n 36 Suppose you want to create a confidence interval for the mean, where a -0.01 Assume s population standard deviation is 4 What is the critical value for the confidence interval? (Give 3 decmials) QUESTION 12 Clidl Save and Submit to save and submit Cliok Save All Answers to saive all ansuvers

Explanation / Answer

Question 8

Margin of error = tn-1,alpha/2*(s / n0.5)

tn-1,alpha/2 = t36-1,0.01/2 = t35,0.005 = 2.996

s = 4 and n= 36

Margin of error = tn-1,alpha/2*(s / n0.5) = 2.996*(4 / 360.5) = 1.997

Question 9

Lower bound = Mean - Margin of error = 20 - 1.997 = 18.003

Question 10

Upper bound = Mean - Margin of error = 20 + 1.997 = 21.997

Question 11

Critical value for the confidence interval = Zalpha/2 = Z0.01/2 = Z0.005 = 2.576

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