A newspaper editor wants to investigate whether the residents of two counties support the proposal to build a wind farm. She plans to take an SRS of 30 residents from the southern county and 40 residents from the
northern county, then look at the difference (southern - northern) between the proportions of residents
that support the proposal in each sample. Suppose that 65% of the residents of the southern county and 52%
of the residents of the northern county approve.
What are the mean and standard deviation of the sampling distribution of the difference in sample
proportions?

Free brainliest + free points if answered ! vehicles are expected to be moving at around on highways. a. 30-50 mph b. 40-60 mph c. 50-70 mph d. 60-80 mph

When did human beings first arrive in the americas? how did they get there?

In a recent telephone survey, 5,000 randomly selected teenagers were asked to cite their primary social network site. six of 10 teenagers said they use mybook as their primary social network site. a 95% confidence interval to estimate the true proportion of teenagers who use mybook as their primary social network site is found to be (0.2964, 0.9036). which of the following is a correct interpretation of the confidence level? ninety-five percent of all samples of this size would yield a confidence interval of (0.2964, 0.9036). there is a 95% chance that the true proportion of teenagers who use mybook as their primary social network site is in the interval (0.2964, 0.9036). ninety-five percent of the time, the procedure used to generate this interval will capture the true proportion of teenagers who use mybook as their primary social network site. ninety-five percent of all the samples of size 5,000 lie in the confidence interval (0.2964, 0.9036).