The Basic Practice of Statistics 7th Edition

Published by W. H. Freeman
ISBN 10: 146414253X
ISBN 13: 978-1-46414-253-6

Chapter 20 - Inference about a Population Mean - Chapter 20 Exercises - Page 478: 20.30b

Answer

For the validity of t-value procedure, following conditions should be met: a. The sample should be taken randomly from the population. b. The distribution of the sample should be approximately normal. c. It is better if the sample is large enough (> 30).

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