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Question

Find the appropriate confidence interval for the true mean life of heat pumps. The 


sample

standard deviation is 1.93 

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The lifetime of a certain brand of heat pump is known to be normally distributed. A sample of 6 heat pumps yielded the following
observations:
2.0 13 6.0 1.9 5.1 4
At a significance level of a= . 10 we will see if there is reason to believe that the mean life
of the heat pumps is different from 2.
Find the appropriate confidence interval for the true mean life of heat pumps. The
sample standard deviation is 1.93

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