MATLAB: An Introduction with Applications
6th Edition
ISBN: 9781119256830
Author: Amos Gilat
Publisher: John Wiley & Sons Inc
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Transcribed Image Text:We want to conduct a hypothesis test of the claim that the population mean reading speed of second graders is different from 28.1
words per minute. So, we choose a random sample of students' reading speeds. The sample has a mean of 28.4 words per minute and
a standard deviation of 2.9 words per minute.
For each of the following sampling scenarios, choose an appropriate test statistic for our hypothesis test on the population mean. Then
calculate that statistic. Round your answers to two decimal places.
(a) The sample has size 19, and it is from a normally distributed population with a known standard deviation of 2.8.
"our re
Ot =
O It is unclear which test statistic to use.
(b) The sample has size 20, and it is from a population with a distribution about which we know very little.
O It is unclear which test statistic to use.
Check
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ace
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