Construct the indicated confidence interval for the difference between population proportions p1 - P2. Assume that the samples are independent and that they have been randomly selected. 19) x1 = 27, n1 = 67 and x2 = 27, n2 = 72; Construct a 95% confidence interval for the difference between population proportions p1 - P2. 19)

Suppose a 90 percent confidence interval to estimate a population proportion was calculated from a sample proportion of 18 percent and a margin of error of 4 percent. What is the width of the confidence interval?

Find the value for each ta/2 Prompts Submitted Answers n = 18 for the 99% confidence interval for the Choose a match mean. n = 10 for the 90% confidence interval for the Choose a match mean. n = 15 for the 98% confidence interval for the Choose a match mean.

aro. For 30 randomly selected Rolling Stones concerts, the mean gross earnings is 2.99 million dollars. Part a) Assuming a population standard deviation gross earnings of 0.48 million dollars, obtain a 99% confidence interval for the mean gross earnings of all Rolling Stones concerts (in millions). Confidence interval: (

A random sample of 180 men indicated that 50 were smokers, and a random sample of 150 women surveyed indicated that 39 smoked. Construct a 98% confidence interval for the true difference in proportions of male and female smokers.

3) Find only the margin of error to construct a 98% confidence interval for p1 - P2. Assume the samples are random and independent. Do not construct a confidence interval. Sample statistics: n₁ = 1000, x1 = 250, and n2 = 1200, x2 = 195