Question: Question 8 s M Gmail YouTube Maps _905 /265_1&step=null Remaining Time: 1 hour, 18 minutes, 49 seconds. Question Completion Status: QUESTION 8 A sample of

Question 8

s M Gmail YouTube Maps _905 /265_1&step=null Remaining Time: 1 hour, 18 minutes, 49 seconds. Question Completion Status: QUESTION 8 A sample of 30 is taken from a population of Inconel weldments. The average thickness is 1.87 inches at a key location on the part. The sample standard deviation is 0.125 inches and will be used as an estimate of population standard deviation. Calculate the 95% confidence interval for the average thickness of the population. (Hint: Z(a/2) is 1.96 for a 95% CI) (1.565, 1.715) (1.825, 1.915) O (1.665, 1.815) O (1.865, 2.015) QUESTION 9 In a study using 9 samples, and in which the population variance is unknown, the distribution that should be used to calculate confidence intervals is Click Save and Submit to save and submit. Click Save All Answers to save all answers

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