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

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A: Given that, Mean = 130 Standard deviation = 20 Raw score = 156

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A: The Standard Error of the estimator is the Standard deviation of the estimator.

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