Title: What will increase the width of a confidence interval?
Headings: What will increase the width of a confidence interval?
What will increase the width of a confidence interval?
To find the width:

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From the formula, it should be clear that: The width of the confidence interval decreases as the sample size increases. The width increases as the standard deviation increases. The width increases as the confidence level increases (0.5 towards 0.99999 - stronger). Click to see full answer
Thereof, what will decrease the width of a confidence interval? Increasing the sample size decreases the width of confidence intervals, because it decreases the standard error. c) The statement, "the 95% confidence interval for the population mean is (350, 400)", is equivalent to the statement, "there is a 95% probability that the population mean is between 350 and 400". Also, what 3 elements can influence the width of a confidence interval? The width of a confidence interval is affected by 3 measures: