Hypo.Test.Examples (1)

# Hypo.Test.Examples (1) - Test for Population Mean(Variance...

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1 Test for Population Mean (Variance Known) Ex: A manufacturer of sprinkler systems used for fire protection in office buildings asserts that the true average system-activation temperature is 130 F. You wish to test whether the assertion is true. You collect a sample of n = 9 systems, and when tested, the sample yields a sample average activation temperature of 131.08 F. If the distribution of activation times is normal with standard deviation 1.5 F, does the data contradict the manufacturer’s assertion at significance level 05 . 0 ?

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2 Ex: The health of the bear population in Yellowstone National Park is monitored by periodic measurements taken from anesthetized bears. A sample of 54 bears has a mean weight of 182.9 lb. Assuming that is known to be 121.8 lb, use a 0.10 significance level to test the claim that the mean weight of the population of all such bears is less than 200 lb.
3 Ex: The life in hours of a battery of Type X is known to be approximately normally distributed with standard deviation 25 . 1

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