A random sample of 250 bolts from machine A contained 17 defective bolts, while an independently chosen, random sample of 400 bolts from machine B contained 32 defective bolts. Let p, be the proportion of the population of all bolts from machine A that are defective, and let p, be the proportion of the population of all bolts from machine B that are defective. Find a 99% confidence interval for p,-p2. Then complete the table below. Carry your intermediate computations to at least three decimal places. Round your responses to at least three decimal places. (If necessary, consult a list of formulas.) What is the lower limit of the 99% confidence interval? What is the upper limit of the 99% confidence interval?

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A random sample of 250 bolts from machine A contained 17 defective bolts, while an independently chosen, random sample of 400 bolts from machine B
contained 32 defective bolts. Let p1
be the proportion of the population of all bolts from machine A that are defective, and let p, be the proportion of the
population of all bolts from machine B that are defective. Find a 99% confidence interval for p, -p2. Then complete the table below.
Carry your intermediate computations to at least three decimal places. Round your responses to at least three decimal places. (If necessary, consult a list of
formulas.)
What is the lower limit of the 99% confidence interval?
What is the upper limit of the 99% confidence interval?
Transcribed Image Text:A random sample of 250 bolts from machine A contained 17 defective bolts, while an independently chosen, random sample of 400 bolts from machine B contained 32 defective bolts. Let p1 be the proportion of the population of all bolts from machine A that are defective, and let p, be the proportion of the population of all bolts from machine B that are defective. Find a 99% confidence interval for p, -p2. Then complete the table below. Carry your intermediate computations to at least three decimal places. Round your responses to at least three decimal places. (If necessary, consult a list of formulas.) What is the lower limit of the 99% confidence interval? What is the upper limit of the 99% confidence interval?
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