C) 0.9082 D) 0.5000 Question 4 If the completion time for a task is normally d

C) 0.9082
D) 0.5000
Question 4
If the completion time for a task is normally distributed with a mean of 15 seconds and a standard deviation of 2.5 seconds what is the probability of getting a time less than 9.7 seconds?Question 4 options:
A) 43.60%
B) 93.60% C) 48.30%
D) 1.70%
Question 5
The standard normal distribution always has a mean of zero and a standard deviation of 1?Question 5 options:
A) True
B) False
C) Perhaps on Tuesdays
D) NeverQuestion 6
Good Time Movie Theaters has studied the spending habits of customers at their concession counters to find the data normally distributed with a mean of $13.40 and a standard deviation of $2.10. A theater manager wants to know the probability of a customer spending more than $17.50 at the concession stand.Question 6 options:
A) 12.0%
B) 1.4%
C) 2.6%
D) 47.4%Question 7
What is the probability that an event will occur between z = -0.46 and z = 2.21 on the standard normalized curve?Question 7 options:
A) 0.4864
B) 0.3092
C) 0.1772
D) 0.6636Question 8
The scores on a National High School English Test are normally distributed with an average sore of 83 and a standard deviation of 6. What is the probability that someone will score between 80.24 and 96.26?Question 8 options:
A) 0.4864
B) 0.6636
C) 0.1772
D) 0.3092
Question 9
On a History test where the student grades are distributed normally the average grade was 78 and the standard deviation was 10. Determine the numeric score of two students whose standard scores (a.k.a. z-scores) were -0.6 and 1.2 respectively.Question 9 options:
A) I have no idea
B) 72 and 90
C) 78 and 60
D) 84 and 90
Question 10
If a fair coin is tossed 200 times what is the probability that you will see between 80 and 120 heads? If the Normal approximation to the Binomial distribution applies use it. If not use the Binomial distribution methods.Question 10 options:
A) 0.9954
B) 0.0023
C) 0.4977
D) 0.5000
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