The data ranged from 205 pounds to 385 pounds. They asked 30 of their teammates for their estimated maximum lift on the bench press exercise.
Three of his players thought that the mean weight was more than that amount. It is known that the standard deviation is 55 pounds. Assume that the swim times for the 25-yard freestyle are normal.Ī college football coach thought that his players could bench press a mean weight of 275 pounds. Conduct a hypothesis test using a preset α = 0.05. Frank thought that the goggles helped Jeffrey to swim faster than the 16.43 seconds. For the 15 swims, Jeffrey’s mean time was 16 seconds.
Frank bought Jeffrey a new pair of expensive goggles and timed Jeffrey for 15 25-yard freestyle swims. His dad, Frank, thought that Jeffrey could swim the 25-yard freestyle faster by using goggles. Jeffrey, as an eight-year old, established a mean time of 16.43 seconds for swimming the 25-yard freestyle, with a standard deviation of 0.8 seconds. Please provide more than just the answer. Solve Examples 1 and 2 using Minitab and interpret the output in each example to conclude whether the null hypothesis must be rejected.
***If you don’t have experience using Minitab software, please do not attempt the following 2 problems:
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