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CÂU HỎI 6 (SINGLECHOICE)
The amount of time that a customer spends waiting at an airport check-in counter is random variable with mean 7.3 minutes and standard deviation 1.8 minutes. Suppose that a random sample of n = 36
customers is observed. Find the probability that the average time waiting in line for these customers is less than 8 minutes.
0.725
None of the other choices is correct
1
0.99
CÂU HỎI 7 (SINGLECHOICE)
Consider the following sample data: 25, 11, 6, 4, 2, 17, 9, 6. Find median.
6.5
8
7.5
10
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