Question 162.5 / 2.5 pointsThe mean score on the exit examination for an urban high school is 63 with a standard deviation of 8. What is the mean of the distribution of sample means with a sample size of 9?
Question options:a) 62b) 63c) 63.5d) 64
Question 172.5 / 2.5 pointsThe annual precipitation amounts in a certain mountain range are normally distributed with a mean of 88 inches, and a standard deviation of 10 inches. What is the likelihood that the mean annual precipitation during 25 randomly picked years will be less than 90.8 inches?

Question 182.5 / 2.5 pointsDecide which of the described variables likely have a normal or near-normal distribution.A) The amount of change held by a teacher at the end of each day for a yearB) The amount of pocket money held by each student at a midsized liberal arts college at a given timeC) The number of heads that show when two coins are tossed
A
B
C
Question 192.5 / 2.5 pointsWhich of the following statements concerning the standard normal curve is/are true (if any)?
Question options:

A
Question 202.5 / 2.5 pointsIf light bulbs have lives that are normally distributed with a mean of 2500 hours and a standard deviation of 500 hours, approximately what percentage of light bulbs has a life of more than 3000 hours?
Question options:a) About 84%b) About 68%c) About 32%d) About 16%
Lesson 5 Exam
Question 212.5 / 2.5 pointsA class consists of 50 women and 82 men. If a student is randomly selected, whatis the probability that the student is a woman?

Question 222.5 / 2.5 pointsA sample space consists of 46 separate events that are equally likely. What is the probability of each?
Question 232.5 / 2.5 pointsIn the first series of rolls of a die, the number of odd numbers exceeded the number of even numbers by 5. In the second series of rolls of the same die, the number of odd numbers exceeded the number of even numbers by 11. Determine which series is closer to the 50/50 ratio of odd/even expected of a fairly rolled die.

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- Spring '19
- Normal Distribution, Standard Deviation