Mathematics, 22.04.2020 04:08 thonio091
A manufacturer of hard safety hats for construction workers is concerned about the mean and the variation of the forces its helmets transmit to wearers when subjected to a standard external force. The manufacturer desires the mean force transmitted by helmets to be 800 pounds (or less), well under the legal 1000-pound limit, and desires σ to be less than 40. Tests were run on a random sample of n = 40 helmets, and the sample mean and variance were found to be equal to 825 pounds and 2350 pounds2 , respectively. Construct a 95% confidence interval for the population variance.
Answers: 2
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A manufacturer of hard safety hats for construction workers is concerned about the mean and the vari...
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