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Question 1
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X ~ N (54, 8) {this means that X is a random variable that follow a normal
distribution with mean 54 and standard deviation 8}. Find the probability that x
> 56 (P (x > 56)).
Question 1Answer
a.
0.012
b.
0.4013
c.
0.5013
b
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Question 2
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What is the probability that a standard normal random variable is between –0.73
and 2.27?
Question 2Answer
,
, a.
0.7557
b.
1.54
c.
0.4884
d.
0.2211
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Question 3
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What expression represent the area to the left of 1?
Question 3Answer
a.
P (x>1)
b.
P (x <1)
c.
P (x =1)
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Question 4
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What expression represents the area to the right of 1?