If n = 320 and ˆpp^ (p-hat) = 0.55, construct a 95% confidence interval. Give your answers to three decimals

Linda is in her first semester at a university and is taking a calculus course with a large enrollment. She just took the first midterm exam and is nervous about her score, which was 68. Among all the students in the course, the mean of the exam was 79 with a standard deviation of 15. Find the =-score of Linda's exam score relative to the exam scores among all the students in the course. Round your answer to two decimal places.

The confidence interval for a population mean is (7.43, 7.59). What are the sample mean and the margin of error? Margin of Error = Give your answers as decimals, to two places.

If n = 460 and ˆpp^ (p-hat) = 0.4, construct a 95% confidence interval in excel.Give your answers to three decimals

Please help in this question detailed way and show tve output of critical value using excel output, thanks

Among 157 Cuban American men ,the mean systolic blood pressure was 146 mm Hg with a standard deviation of 27. We wish to know if based on these data, we may conclude that the mean systolic blood pressure for a population of Cuban American is greater than 140. Use α=0.01 (solve without excel) , show work

Calculate the test statistic. (X^2)Enter your answer rounded to three decimal places.