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An engineer has carefully measured the spacing between anchor bolts (in mm) as: 19   23   21   21 19  ...

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Question

Statistics

An engineer has carefully measured the spacing betweenanchor bolts (in mm) as:
19   23   21   21
19   13   26   15
30   30   17   24
20   16   24   20
Find:
a. The 90 percent CI for µ
b. The 80 percent CI for µ
c. The 99 percent CI for µ assuming σ = 4.1 mm is known

Answer & Explanation Solved by verified expert
3.8 Ratings (590 Votes)
Givenn 16 observations givena 90 confidence interval for The formula to find the confidence interval for population meanwhen population standard deviation know isWhere Z z critical value at given confidence    See Answer
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