Use the confidence interval to find the margin of error and the sample mean. (0.392,0.490) The margin of error is The sample mean is

Private Four-Year Colleges From the data in CollegeScores4yr we know that about 62% of four-year colleges in the US are private institutions. Suppose that we select samples of n = 75 schools at a time from the population of all four-year colleges and find the proportion of private schools in each sample. (a) Consider the distribution of these sample proportions when n = 75 and p = 0.62. What is its form? Center = i Standard error = (round to three decimal places) (b) What proportion of these samples will have less than 50% private schools? Round to three decimal places. i

Use the given confidence interval to find the margin of error and the sample mean.  (4.81, 8.09)

Use the confidence interval to find the estimated margin of error. Then find the sample mean. A biologist reports a confidence interval of (2.3,3.1) when estimating the mean height (in centimeters) of a sample of seedlings. The estimated margin of error is The sample mean is B

Assume that a sample is used to estimate a population proportion p. Find the margin of error E that corresponds to the statistics and confidence level. Round the margin of error to four decimal places. 90% confidence; n = 369, x = 133 Type your answer...

n= 1655 (nubers of tries), x=176 (number of success tries), 98% confidence. Find the confidence interval estimate of the population proportion p.

Use the confidence interval to find the estimated margin of error. Then find the sample mean.   A store manager reports a confidence interval of (48.1,78.7) when estimating the mean price​ (in dollars) for the population of textbooks. The estimated margin of error is?

Use the formula in this example to determine the sample size, n.The estimated prevalence is 19%, and the desired confidence level is 93% with a margin of error of 4%. (Round your answer to the nearest integer.)n =

Use the confidence interval to find the estimated margin of error. Then find the sample mean. A biologist reports a confidence interval of (2.3,3.3) when estimating the mean height (in centimeters) of a sample of seedlings. The estimated margin of error is

Use the confidence interval to find the margin of error and the sample mean. (0.346,0.450) The margin of error is The sample mean is 9 五 0 SF10