Find mean and standard deviation of the number of parts
A manufacturer of replacement parts estimates that 90% of the parts are useable. If the manufacturer sells the parts in packages of 10 parts, what are the mean and standard deviation of the numberof useable parts in a package?
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If the manufacturer sells the parts in packages of 10 parts, what are the mean and standard deviation of the numberof useable parts in a package?
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The bowling balls the sample standard deviation was found to be 0.52 pounds. Construct a 95% confidence interval for the variance of the bowling ball weight.
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