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.    6.33. The mean and standard deviation of the diameters of a sample of 250 rivet...

.    6.33. The mean and standard deviation of the diameters of a sample of 250 rivet heads manufactured by a company are 0.72642 inch and 0.00058 inch, respectively (see Problem 5.99). Find (a) 99%, (b) 98%, (c) 95%,?(d) 90% confidence limits for the mean diameter of all the rivet heads manufactured by the company. ?

.    6.34. Find (a) the 50% confidence limits, (b) the probable error for the mean diameter in Problem 6.33. ?

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