A manufacturer claims that the mean
lifetime of its drill is 1000 hours. A
h...
Mathematics, 06.05.2020 22:09 jose55221
A manufacturer claims that the mean
lifetime of its drill is 1000 hours. A
homeowner selects 25 drills and finds
the mean lifetime to be 980 hours with a
sample standard deviation of 80 hours.
If = 0.05, test the manufacturer's claim.
A manufacturer claims that the mean
lifetime of its drill is 1000 hours. A
homeowner selects 25 drills and finds
the mean lifetime to be 980 hours with a
sample standard deviation of 80 hours.
If = 0.05, test the manufacturer's claim.
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