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In a random sample of four mobile devices, the mean repair cost was $70.00 and the standard deviation was $12.00. Assume the population is normally distributed and use a t-distribution to find the margin of error and construct a 90% confidence interval for the population mean. Interpret the results. The 90% confidence interval for the population mean µ is ( ☐, ☐ ). (Round to two decimal places as needed.) The margin of error is $. (Round to two decimal places as needed.) Interpret the results. Choose the correct answer below.

In a random sample of four mobile devices, the mean repair cost was $70.00 and the standard deviation was $12.00. Assume the population is normally distributed and use a t-distribution to find the margin of error and construct a 90% confidence interval for the population mean. Interpret the results. The 90% confidence interval for the population mean µ is ( ☐, ☐ ). (Round to two decimal places as needed.) The margin of error is $. (Round to two decimal places as needed.) Interpret the results. Choose the correct answer below.

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter10: Statistics
Section: Chapter Questions
Problem 22SGR
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In a random sample of four mobile devices, the mean repair cost was $70.00 and the standard deviation was $12.00. Assume the population is normally distributed and use a t-distribution to find the margin of error and construct a 90% confidence interval for the population mean. Interpret the results. The 90% confidence interval for the population mean µ is ( ☐, ☐ ). (Round to two decimal places as needed.)
Transcribed Image Text:In a random sample of four mobile devices, the mean repair cost was $70.00 and the standard deviation was $12.00. Assume the population is normally distributed and use a t-distribution to find the margin of error and construct a 90% confidence interval for the population mean. Interpret the results. The 90% confidence interval for the population mean µ is ( ☐, ☐ ). (Round to two decimal places as needed.)
The margin of error is $. (Round to two decimal places as needed.) Interpret the results. Choose the correct answer below.
Transcribed Image Text:The margin of error is $. (Round to two decimal places as needed.) Interpret the results. Choose the correct answer below.
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