Answer
2.571.
Work Step by Step
$\alpha=1-0.95=0.05.$ $\sigma$ is not known, hence we use the t-distribution with $df=sample \ size-1=6-1=5$ in the table. $t_{\alpha/2}=t_{0.025}=2.571.$
Essentials of Statistics (5th Edition)
by Triola, Mario F.
Published by
Pearson
ISBN 10:
0-32192-459-2
ISBN 13:
978-0-32192-459-9
Chapter 7 - Estimates and Sample Sizes - Review - Chapter Quick Quiz - Page 367: 9
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