The average age of cars owned by resident of a small city is 6 years with a student deviation of 2.0 years. A simple random sample of 400 cars is to be selected, and the sample mean age of these cars computed. What is the probability that the average age of the 400 cars is more than 6.1 years?
Thanks so much
Statistics Probability
2015-03-19 7:47 am
回答 (1)
2015-03-20 11:03 am
收錄日期: 2021-04-18 15:01:53
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