Exhibit 6-2 Th 40 and e travel time for a college student traveling between her

Question

Exhibit 6-2 Th 40 and e travel time for a college student traveling between her home and her college is uniformly distributed between 90 minutes. 20. Refer to Exhibit 6-2. The probability that she will finish her trip in 80 minutes or less is a. 0.2 b. 0.02 c. 1.00 d. 0.8 21. A subset of a population selected to represent the population is a a. small population b. sample c. subset d. None of the alternative answers is correct. 22. When the level of confidence increases, the confidence interval a. cannot tell from the information given b. stays the same c. becomes wider d. becomes narrower Io nronortions can be approximated by a nor

Explanation / Answer

20)P(X<80)=(80-40)/(90-40)=0.8

option d

21)

option b

22)it becomes wider therefore

option C

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