Question

A sample of eight repair records for a certain fiber optic component was drawn, and the cost of each repair, in dollars, was recorded. The results were 30 35 19 23 27 22 26 20 Assume the population of repair records is normal. Find a 95% confidence interval for the population standard deviation. Round the answers to three decimal places. The 95% confidence interval is ( , ).

          A sample of eight repair records for a certain fiber optic component was drawn, and the cost of each repair, in dollars, was recorded.
The results were
30
35
19
23
27
22
26
20
Assume the population of repair records is normal. Find a 95% confidence interval for the population standard deviation. Round the
answers to three decimal places.
The 95% confidence interval is ( , ).

A sample of eight repair records for a certain fiber optic component was drawn, and the cost of each repair, in dollars, was recorded.
The results were
30
35
19
23
27
22
26
20
Assume the population of repair records is normal. Find a 95% confidence interval for the population standard deviation. Round the
answers to three decimal places.
The 95% confidence interval is ( , ).

Added by Jason S.

Elementary Statistics a Step by Step Approach

Allan G. Bluman 9th Edition

Instant Answer

Solved by Expert Sheryl Ezze

06/10/2022

Step 1

Given repair costs: 30, 35, 22, 26, 20 Sample mean (X̄) = (30 + 35 + 22 + 26 + 20) / 5 = 25.25 Sample standard deviation (s) = 5 Show more…

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A sample of eight repair records for a certain fiber optic component was drawn, and the cost of each repair, in dollars, was recorded. The results were 30 35 19 23 27 22 26 20 Assume the population of repair records is normal. Find a 95% confidence interval for the population standard deviation. Round the answers to three decimal places. The 95% confidence interval is