Stats Multiple Choice Questions

Stats Multiple Choice Questions

Question
	


Question 1
1. Let X be a random variable with the standard normal distribution.
Find: P(-1.56 X <-0.81). /

0.1496

0.7910

0.9406

0.7316

None of the above 


Question 2
1. Diastolic blood pressure measurements of 100 adult males is distributed as X ~ N(m = 84,s 2 = 36) .How many males are at risk of high blood pressure (blood pressure above 90)?

0.1587

16

15.8660

12









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Question 3
1. Let X be a random variable with the standard normal distribution.Find: P(X > 1.23). 

0.8907

0.1093

0.9032

0.8849

None of the above
Question 4
1. For some positive value of Z, the probability that a standard normal variable is between 0 and Z is 0.3340. The value of Z is:

0.07

0.37

0.97

1.06
Question 5
1. For some value of Z, the probability that a standard normal variable is below Z is 0.2090. The value of Z is:

- 0.81

- 0.31

0.31

1.96



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Question 6
1. Let X be a random variable with the standard normal distribution.Find: P(X <- 2.57). .

0.9938

0.9965

0.0051

0.9949

None of the above 

Question 7
1. Find the area under the standard normal curve for z = 0.07.

0.5

0.7580

0.5279

0.5398

0.512


Question 8
1. Find the area under the standard normal curve for z = 2.36.

0.9918

0.9987

0.9911

0.9909

None of the preceding
Question 9
1. For some positive value of X, the probability that a standard normal variable is between 0 and +2X is 0.1255. The value of X is:

0.99

0.40

0.32

0.16

Question 10
1. For some positive value of Z, the probability that a standard normal variable is between 0 and Z is 0.3770. The value of Z is:

0.18

0.81

1.16

1.47