Elementary Statistics: A Step-by-Step Approach with Formula Card 9th Edition

Published by McGraw-Hill Education
ISBN 10: 0078136334
ISBN 13: 978-0-07813-633-7

Chapter 8 - Hypothesis Testing - 8-1 Steps in Hypothesis Testing-Traditional Method - Exercises 8-1 - Page 426: 9

Answer

We perform a one tail test when we want to ascertain the direction of difference in two parameters, for example right or left direction. We perform a two tail test when we only want to ascertain the difference between two groups and either not interested in direction of not enough data is given.

Work Step by Step

Given above
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