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Explain whether the width of a 95% confidence interval would increase, decrease, or remain the same...

Explain whether the width of a 95% confidence interval would increase, decrease, or remain the same as a result of each of the following changes.

(a) Decrease the confidence level from 95% to 90%.

(b) Decrease the sample size from n = 1000 to n = 500.

Math   Statistics-And-Probability   
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