A Manufacturer of floor mops would like his product to last 700 hours, on the average....
A Manufacturer of floor mops would like his product to last 700 hours, on the average. He hopes the mean number of hours is not a lot less than 700 (people will not continue to buy his product) or a lot more than 700 (people would seldom have to buy the product). However, the manufacturer has reason to believe the mean may have changed. A random sample of 48 items shows that X̄= 675 and s=77 hours.
a. Complete the test at the 5% level of significance.
b. What type of error may have been made?
c. What is the probability of committing this error?
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A Manufacturer of floor mops would like his product to last 700
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