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A Manufacturer Wants to Estimate the Proportion of Defective Items

Question 115

Multiple Choice

A manufacturer wants to estimate the proportion of defective items that are produced by a certain machine. A random sample of 50 items is taken. Which Excel function would not be appropriate to construct a confidence interval estimate?


A) NORM.S.INV
B) COUNTIF
C) STDEV
D) All are appropriate.

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