1. Which of the following illustrations represents normal distribution?
2. What is another name for normal distribution?
A Gaussian distribution B Poisson distribution C. Bernoulli's distribution D Probability distribution
3. What is the total area in the distribution under the normal curve?
А 0
B. 1
C2
D 3
4. Which of the following is a parameter of normal distribution?
A mean
B standard deviation
C mean and standard deviation D none of the above
5. The graph of a normal distribution is symmetrical about the
A mean
B standard deviation C. mean and standard deviation D none of the above
6. What percent of the area under a normal curve is within 2 standard deviations?
A 68.3% B. 95 4% C. 99.7% D 100%
7 How many standard deviations are there in each inflection point?
AO
B. I
C2
D3
8. Which of the following denotes the standard normal distribution?
AA
B.X
CY
D Z
9. A random variable X has a mean of 12 and a standard deviation of 3.2 What is the corresponding Z-score for x
8?
A-1.25
B -1.50 C-175
D -2.25
10 What is the area under the normal curve if the Z-score given is 2.14?
A 09830 B. 0.9834 C. 0.9838 D. 0.9842
11. What is the Z-score if the area under the normal curve is 0.0475?
A -166
B. -1.67 C. 166
D 1.67
12. What is the area under the normal curve between the Z-scores -1.99 and 1.56?
A09173 B. 0.9317 C 0.9369 D. 0.9639
13 What is the area of the P(Z > 2 58) using the standard normal curve?
A 0.0049 B. 00051 C. 0.9949 D 0.9951
14. In an achievement test, the mean score of normally distributed values is 70 and the standard deviation is
12. What is the percentage of students who got a score of 85 and above?
A01056 B 0.1075 C. 0.8925 D 0.8944
15 What is the value of 70th percentile in a standard normal distribution?
A 0.51
B 0.52
C. 0.61
D. 0.62​