Construct a confidence interval for p1−p2 at the given level of confidence. x1=32​, n1=260​, x2=33​, n2=278​, 99​% confidence   The researchers are ___% confident the difference between the two population​ proportions, p1−p2​, is between ___ & ___.

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.

Construct the confidence interval for the population mean μ. c=0.90​, x=7.2​, σ=0.4​, and n=48   A 90​% confidence interval for μ is _______ ​(Round to two decimal places as​ needed.)

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

A sample of n = 7 scores is selected from a population with an unknown mean ( µ). The sample has a mean of M = 40 and a variance of s 2 = 63. Which of the following is the correct 95% confidence interval for µ?

If n=400 and X=80​, construct a 90​% confidence interval estimate for the population proportion.   ______≤π≤_____ ​(Round to four decimal places as​ needed

In a recent poll, 430 people were asked if they liked dogs, and 94% said they did. Find the Margin of Error for this poll, at the 95% confidence level. Give your answer to four decimal places if possible.   ______________________