Question

A manufacturer of sprinkler systems used for fire protection in office buildings claims that the true average system-activation temperature is 130°. A sample of n = 9 systems, when tested, 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 claim at significance level α=.01?

Answer #1

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A manufacturer of sprinkler systems used for fire protection in
office buildings claims that the true average system-activation
temperature is 130o F. A sample of n = 9
systems, when tested, yields a sample average activation
temperature of 131.08o F. If the distribution of
activation times is normal with standard deviation 1.5o
F, does the data contradict the manufacturer’s claim at a
significance level of 0.01? Answer this question
via the following parts:
a) What is the parameter of interest?...

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