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I am trying to figure out how many participants i will need for my research. i need help with the analysis to figure out the needed survey sample size.  As of right know i propose of using 60 mid level and senior level pilots, but my professor said that will not be enough for the survey. I don’t understand what he wants. thanks

Suppose you want to estimate, with 95% confidence, the population mean force required to break an insulator to within +/- 25 pounds. On the basis of a study conducted the previous year, you believe that the standard deviation is 100 pounds. Determine the sample size needed.

The scores on the entrance exam at a well-known, exclusive law school are normally distributed with a mean score of 264 and a standard deviation equal to 36. At what value should the lowest passing score be set if the school wishes only 2.5 percent of those taking the test to pass?

I need the answer in excel. i can upload the excel sheet with the data if needed Data for textbook problems WileyPLUS contains a link for each chapter, “Problem Files in Excel: Chapter <nn>”. By clicking on this you get an Excel file with data sets for each problem that has one—one problem to a tabbed worksheet. Select the problems you need and copy/paste each one of them to its own tabbed worksheet in your own assignment file; I don’t need to see the entire chapter, just the assigned problems. Label the tabs. The Excel Analysis Toolkit is used for […]

Use the frequency distribution to the​ right, which shows the number of voters​ (in millions) according to​ age, to find the probability that a voter chosen at random is in the given age range. not between 25 and 34 years old