Mathematics, 26.08.2019 18:30, Racheal9145
In a random sample of 30 people who rode a roller coaster one day, the mean wait time is 46.7 minutes with a standard deviation of 9.2 minutes. in a random sample of 50 people who rode a ferris wheel the same day, the mean wait time is 13.3 minutes with a standard deviation of 1.9 minutes. construct a 99% confidence interval for the difference between the mean wait times of everyone who rode both rides.
a. (31.7, 35.1)
b. (30.5, 36.3)
c. (29, 37.8)
d. (28.7, 38.1)
Answers: 1
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In a random sample of 30 people who rode a roller coaster one day, the mean wait time is 46.7 minute...
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