An article gave the following summary data on shear strength (kip) for a sample of 3/8-in. anchor bolts: n = 73, x = 5.00, s = 1.20. Calculate a lower confidence bound using a confidence level of 90% for true average shear strength. (Round your answer to two decimal places.) kip
An article gave the following summary data on shear strength (kip) for a sample of 3/8-in. anchor bolts: n = 73, x = 5.00, s = 1.20. Calculate a lower confidence bound using a confidence level of 90% for true average shear strength. (Round your answer to two decimal places.)
kip
An article reported that, in a study of a particular wafer inspection process, 356 dies were examined by an inspection probe and 185 of these passed the probe. Assuming a stable process, calculate a 95% (two-sided) confidence interval for the proportion of all dies that pass the probe. (Round your answers to three decimal places.)
It was reported that in a survey of 4799 American youngsters aged 6 to 19, 18% were seriously overweight (a body mass index of at least 30; this index is a measure of weight relative to height). Calculate a confidence interval using a 99% confidence level for the proportion of all American youngsters who are seriously overweight. (Round your answers to three decimal places.)
Interpret the resulting interval.
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