Question

Explain whether the width of a confidence inter­val would increase, decrease, or remain the same as a result of each of the following changes:
a. The sample size is doubled, from 400 to 800.
b. The population size is doubled, from 25 mil­lion to 50 million.
c. The level of confidence is lowered from 95% to 90%.


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  • CreatedOctober 22, 2015
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