A random sample of 40 items resulted in a sample mean of 25. The population variance is o² = 25. a) What is the standard error of the mean, ag? b) What is the margin of error using a 95% confidence level? c) Compute for a 90% confidence interval for the population mean? Interpret your result.
A random sample of 40 items resulted in a sample mean of 25. The population variance is o² = 25. a) What is the standard error of the mean, ag? b) What is the margin of error using a 95% confidence level? c) Compute for a 90% confidence interval for the population mean? Interpret your result.
Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter10: Statistics
Section10.3: Measures Of Spread
Problem 3CYU
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