Introductory Statistics 9th Edition

by Mann, Prem S.

Published by Wiley

ISBN 10: 1-11905-571-7

ISBN 13: 978-1-11905-571-6

Chapter 8 - Section 8.3 - Estimation of a Population Mean: σ Not Known - Exercises - Page 329: 8.32

Answer

a. α = 1-0.05=0.95, df = 12 $t_{0.95,12}$ = 1.782 b. α = 0.025, df = 66-1 = 65 $t_{0.025,65}$ =-1.997 c. α = 0.001, df = 49 $t_{0.001,49}$ = -3.265 d. α = 1-0.005=0.995, df = 24-1 = 23 $t_{0.995,23}$ = 2.807

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