Elementary Statistics (12th Edition)

Published by Pearson
ISBN 10: 0321836960
ISBN 13: 978-0-32183-696-0

Chapter 8 - Hypothesis Testing - 8-4 Testing a Claim About a Mean - Basic Skills and Concepts: 3

Answer

A t-test is a hypothesis test testing a claim about the mean of the population when the standard deviation of the population is unknown.

Work Step by Step

A t-test is a hypothesis test testing a claim about the mean of the population when the standard deviation of the population is unknown. This test uses the t-distribution. The t-test is more likely to be used, because mostly the standard deviation of the population is unknown and the you can only use the z-test when the population standard deviation is known.
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