Mathematics, 21.02.2020 17:59 mildred3645
Records show that the average commute time for a person living in Atlanta in 2000 was 42 minutes. An analyst claims that the average commute time in 2007 was longer. The analyst takes a simple random sample of thirteen commuters in 2007 and calculates an average of 46.4 and a standard deviation of 3.8. (It is reasonable to assume that the population of commute times has a normal distribution.)
Which of the following is the appropriate test statistic?
t = (46.4 - 42.0)/(3.8/√13)
z = (42.0 - 46.4)/(3.8/√13)
z = (46.4 - 42.0)/(3.8/√13)
t = (42.0 - 46.4)/(3.8/√13)
None of the above
Answers: 3
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Records show that the average commute time for a person living in Atlanta in 2000 was 42 minutes. An...
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