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: 8.31

Answer

There are two cases to use t-distribution:- 1) n < 30 and population is approximate to normal or 2) n $\geq$ 30

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