Construct the confidence interval for the population mean u. c=0.98​, x=16.5​, o=4.0​, and n=60. A 98% confidence interval for u is (___,___). (Round to one decimal place as needed.

According to data from Cosmopolitan magazine, 64% of Americans say there is never enough time inthe day to get things done. Suppose this percentage is based on a random sample of 900 Americans.Find the 90% confidence interval for the true proportion of Americans who hold this belief.Will we use z or t? ________ Why? ______________________________________________________What is the z or t critical value based on 90% confidence? ________What is the standard deviation of the sampling distribution of the mean? ________Calculate the margin of error: E = ________________________Confidence interval: _________________________________________

Find the following. Enter your answer rounded to at least two decimals. Z/2 for the 88% confidence interval za/2 X 3

Out of 600 people sampled, 30 had children under the age of 18. Based on this, construct a 99% confidence interval for the true population proportion of people with children under the age of 18.Give your answers as decimals, to three places.____________ < p < ____________