Introductory Statistics 9th Edition

Published by Wiley
ISBN 10: 1-11905-571-7
ISBN 13: 978-1-11905-571-6

Chapter 8 - Section 8.2 - Estimation of a Population Mean: σ Known - Exercises - Page 323: 8.20

Answer

$\mu$ = 36.02 σ = 0.1 $Z_{0.99}$ = 2.33 s= 0.1/ $\sqrt{20}$ = 0.02236 confidence interval = 36.02 ± 0.02236*2.33 = 36.02 ± 0.052 =[35.97,36.07] There might need an adjustment on the machine since its confidence interval is exceeds the upper limit of acceptance.

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