The weight of gravel, in kilograms, collected by a power shovel may be modeled by a...
The weight of gravel, in kilograms, collected by a power shovel may be modeled by a normal distribution with unknown mean, µ, and standard deviation 50. The weights of a random sample of 20 collections have a mean of 1030 kg.
Calculate the margin of error for a 99% confidence interval estimate of µ
State the 99% confidence interval for the mean, µ.
What sample size is needed so that the error is no more than 15 kg? n = power shovels
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The weight of gravel, in kilograms, collected by a power shovel
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