Answer
$t_c = 2.426$
Work Step by Step
$d. f. = n - 1 = 40 - 1 = 39$
See the $t_c$ value on Table 5 (Appendix B) for d.f. = 39 and c = 0.98:
- It is: 2.426
$t_c = 2.426$
Elementary Statistics: Picturing the World (6th Edition)
by Larson, Ron; Farber, Betsy
Published by
Pearson
ISBN 10:
0321911210
ISBN 13:
978-0-32191-121-6
Chapter 6 - Confidence Intervals - Section 6.2 Confidence Intervals for the Mean - Exercises - Page 315: 4
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