Mathematics, 15.04.2021 22:00 whortonraijan
A survey of 30 adults found that the mean age of a person’s primary vehicle is 5.6 years. Assume the standard deviation is 0.85 year. If the mean age of all primary vehicles is between 5.2 years and 6.0 years, approximately which confidence level does the range represent?
a. 99%
b. 98%
c. 95%
d. 90%
Answers: 2
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A survey of 30 adults found that the mean age of a person’s primary vehicle is 5.6 years. Assume the...
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