A random sample of 40 items resulted in a sample mean of 25. The population variance is ?2 = 25.a. What is the standard error of the mean, ??̅?b. What is the margin of error using a 95% confidence level?c. Compute for a 90% confidence interval for the population mean?d. Compute for a 95% confidence interval for the population mean?e. Compute for a 99% confidence interval for the population mean?
A random sample of 40 items resulted in a sample mean of 25. The population variance is ?2 = 25.a. What is the standard error of the mean, ??̅?b. What is the margin of error using a 95% confidence level?c. Compute for a 90% confidence interval for the population mean?d. Compute for a 95% confidence interval for the population mean?e. Compute for a 99% confidence interval for the population mean?
Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter10: Statistics
Section10.4: Distributions Of Data
Problem 19PFA
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