A researcher claims that the standard deviation of the number of deaths annually from tornadoes in the United States is less than 45. If a random sample of 15 years had a standard deviation of 40, is the claim believable? Use α = 0.05 state the hypothesis find the critical value find the test value what is the decision
A researcher claims that the standard deviation of the number of deaths annually from tornadoes in the United States is less than 45. If a random sample of 15 years had a standard deviation of 40, is the claim believable? Use α = 0.05 state the hypothesis find the critical value find the test value what is the decision
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
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A researcher claims that the standard deviation of the number of deaths annually from tornadoes in the United States is less than 45.
If a random sample of 15 years had a standard deviation of 40, is the claim believable? Use α = 0.05
state the hypothesis
find the critical value
find the test value
what is the decision
Expert Solution
Step 1
In this problem we are asked to a testing of the population standard deviation.
Population SD (0) claimed is less than 45 deaths.
For a sample of 15 years, Sample SD (s) is found to be 40.
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