Mathematics, 05.05.2020 08:19 mprjug6
At a certain manufacturing plant, a machine produced ball bearings that should have a diameter of 0.79mm. If the machine produces ball bearings that are either too small or too large, the ball bearings must be scrapped. Every hour, a quality control manager takes a random sample of 31 ball bearings to test to see if the process is "out of control" (i. e. to test to see if the average diameter differs from 0.79 mm). Assume the population is normally distributed. Conduct an appropriate hypothesis test when your sample yields an average of 0.83 and a standard deviation of 0.055. Find the t-statistic and the appropriate conclusion at the 0.1 level of significance.
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At a certain manufacturing plant, a machine produced ball bearings that should have a diameter of 0....
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