normal curve

A First Course in Probability (10th Edition)
10th Edition
ISBN:9780134753119
Author:Sheldon Ross
Publisher:Sheldon Ross
Chapter1: Combinatorial Analysis
Section: Chapter Questions
Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...
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B. Poisson distribution
C. Bernoulli's distribution
D. Probability distribution
What is the total area in the distribution under the normal curve?
A. O
В. 1
С. 2
D. 3
3.
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
4.
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
5.
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%
How many standard deviations are there in each inflection point?
А. О
В. 1
С. 2
D. 3
7. Which of the following denotes the standard normal distribution?
A. A
В. Х
C. Y
D. Z
8.
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
С. -1.75
D.-2.25
9.
What is the area under the normal curve if the z-score given is 2.14?
A. 0.9830
B0.9834
C.0.9838
D.0.9842
6.
Transcribed Image Text:B. Poisson distribution C. Bernoulli's distribution D. Probability distribution What is the total area in the distribution under the normal curve? A. O В. 1 С. 2 D. 3 3. 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 4. 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 5. 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% How many standard deviations are there in each inflection point? А. О В. 1 С. 2 D. 3 7. Which of the following denotes the standard normal distribution? A. A В. Х C. Y D. Z 8. 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 С. -1.75 D.-2.25 9. What is the area under the normal curve if the z-score given is 2.14? A. 0.9830 B0.9834 C.0.9838 D.0.9842 6.
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