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Question :
31.Refer to Exhibit 5-4. The expected number of machine breakdowns : 1329669

31.Refer to Exhibit 5-4. The expected number of machine breakdowns per month is

a.2

b.1.70

c.one

d.None of the alternative answers is correct.

32.Refer to Exhibit 5-4. The probability of at least 3 breakdowns in a month is

a.0.5

b.0.10

c.0.30

d.None of the alternative answers is correct.

33.Refer to Exhibit 5-4. The probability of no breakdowns in a month is

a.0.88

b.0.00

c.0.50

d.None of the alternative answers is correct.

**Exhibit 5-5**

AMR is a computer-consulting firm. The number of new clients that they have obtained each month has ranged from 0 to 6. The number of new clients has the probability distribution that is shown below.

Number of

__ __New ClientsProbability

00.05

10.10

20.15

30.35

40.20

50.10

60.05

34.Refer to Exhibit 5-5. The expected number of new clients per month is

a.6

b.0

c.3.05

d.21

35.Refer to Exhibit 5-5. The variance is

a.1.431

b.2.0475

c.3.05

d.21

36.Refer to Exhibit 5-5. The standard deviation is

a.1.431

b.2.047

c.3.05

d.21

37.The number of electrical outages in a city varies from day to day. Assume that the number of electrical outages (*x*) in the city has the following probability distribution.

__ __*x*f(*x*)

00.80

10.15

20.04

30.01

The mean and the standard deviation for the number of electrical outages (respectively) are

a.2.6 and 5.77

b.0.26 and 0.577

c.3 and 0.01

d.0 and 0.8

**Exhibit 5-6**

Probability Distribution

__ __*x*f(*x*)

10.2

20.3

30.4

40.1

38.Refer to Exhibit 5-6. The expected value of *x* equals

a.24

b.25

c.30

d.100

39.Refer to Exhibit 5-6. The variance of *x* equals

a.9.165

b.84

c.85

d.93.33

**Exhibit 5-7**

A sample of 2,500 people was asked how many cups of coffee they drink in the morning. You are given the following sample information.

__ __Cups of CoffeeFrequency

0700

1900

2600

3__300__

2,500

40.Refer to Exhibit 5-7. The expected number of cups of coffee is

a.1

b.1.2

c.1.5

d.1.7