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timer Asked: May 4th, 2016

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A manufacturer of sprinkler systems designed for fire protection claims that the average activating temperature is at 135 degrees Fahrenheit. To test this claim, you randomly select a sample of 32 systems and find the mean activation temperature to be 133 degrees Fahrenheit. Assume the population standard deviation is at 3.3 degrees Fahrenheit. At a=0.10, do you have enough evidence to reject the manufacturer's claim? 

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