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In: Statistics and Probability

When constructing confidence intervals for population means, an analyst must never use personal judgement to estimate


When constructing confidence intervals for population means, an analyst must never use personal judgement to estimate a preliminary value of the population standard deviation when attempting to select a sample size for desired margin of error. Calculations must be used for the preliminary value estimate. 

True 

False

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Expert Solution

The sample size is computed from the margin of error as:

A prior estimate of the population standard deviation is used to get the sample size from the above formula instead of using any personal judgement. Otherwise we may get a less conservative sample size or very high conservative sample size for the test.

orchestra answered 2 years ago
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