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:

Content: 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: the value of the multiplier t* (which is driven by both the confidence level and the sample size), the standard deviation s of the original data, and the sample size n used for the data collection. Similarly one may ask, what makes a confidence interval wider? Populations (and samples) with more variability generate wider confidence intervals. Sample Size: Smaller sample sizes generate wider intervals.