For Questions 8–10, use the following information. The number of students at 189 randomly selected bus stops is normally distributed with a mean of 4.3 students and a standard deviation of 1.4 students. 8. About how many of the bus stops will have more than 5.7 students?
4.725
16.0
30.24
128.52
9. What is the probability that a randomly selected bus stop will have fewer than 2.9 students?
16.0%
17.7%
32.0%
35.4%
10. Determine a 90% confidence interval for the population mean.
1.5 < x < 7.1
.1 < x < 8.5
2.9 < x < 5.7
5.7 < x < 8.5