QUESTION 29 A random variable X has a normal distribution with mean 132 and variance 36. If x = 120, then the corresponding value of Z is given by: Z (X- H)/o = -2 O True O False

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Chapter1: Combinatorial Analysis
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QUESTION 29
A random variable X has a normal distribution with mean 132 and variance 36. If x = 120, then the corresponding value of Z is
given by:
Z = (X – µ)/o = -2
O True
O False
Transcribed Image Text:QUESTION 29 A random variable X has a normal distribution with mean 132 and variance 36. If x = 120, then the corresponding value of Z is given by: Z = (X – µ)/o = -2 O True O False
QUESTION 28
Suppose X = the number of cars owned by a family in the UAE. The probability distribution of X is shown in the table below.
Suppose you choose three families at random. What is the chance that each of these three families owns two cars?
1
3
Probability
0.56
0.23
0.12
0.09
O (0.56) x (0.23) x (0.12)
O (0.12) + (0.12) + (0.12)
O (0.56) + (0.23) + (0.12)
O (0.12) x (0.12) x (0.12)
Transcribed Image Text:QUESTION 28 Suppose X = the number of cars owned by a family in the UAE. The probability distribution of X is shown in the table below. Suppose you choose three families at random. What is the chance that each of these three families owns two cars? 1 3 Probability 0.56 0.23 0.12 0.09 O (0.56) x (0.23) x (0.12) O (0.12) + (0.12) + (0.12) O (0.56) + (0.23) + (0.12) O (0.12) x (0.12) x (0.12)
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