Construct a 90​% confidence interval to estimate the population proportion with a sample proportion equal to 0.35 and a sample size equal to 120.   A 90​% confidence interval estimates that the population proportion is between a lower limit of ____?____and an upper limit of ____?_

An IQ test is designed so that the mean is 100 and the standard deviation is 23 for the population of normal adults. Find the sample size necessary to estimate the mean IQ score of statistics students such that it can be said with 90% confidence that the sample mean is within 8 IQ points of the true mean. Assume that o = 23 and determine the required sample size using technology. Then determine if this is a reasonable sample size for a real world calculation. The required sample size is (Round up to the nearest integer.)

If a school district takes a random sample of 55 Math SAT scores and finds that the average is 422, and knowing that the population standard deviation of Math SAT scores is intended to be 100. Find a 99% confidence interval for the mean math SAT score for this district.   ______ ≤ μ ≤ _______

If n=15n=15, ¯xx¯=43, and s=20s=20, construct a confidence interval at a 90% confidence level. Give your answers to one decimal place.  _____< μ < _____ Technology