# Can you check these questions for me?

Anonymous

Question description

I got 36.5 for 1, and 11.5 for 2, and 6 for 3. That's all I got so far.

### QUESTION 1

1. Exhibit 2-2A survey of 800 college seniors resulted in the following crosstabulation regarding their undergraduate major and whether or not they plan to go to graduate school.

 Undergraduate Major Graduate School Business Engineering Others Total Yes 70 84 126 280 No 182 208 130 520 Total 252 292 256 800

Refer to Exhibit 2-2. What percentage of the students' undergraduate major is engineering?

 292 520 65 36.5

4 points

### QUESTION 2

1. The hourly wages of a sample of 8 employees in a corporation is given below
10,7,13,15,10,8,20,21
What is the sample median?

 13 10 11.5 8 none of the above

4 points

### QUESTION 3

1. In order to determine the average number of local calls in an office, 8 calls were selected randomly. The duration of each call is shown below .
2, 10, 12, 3, 5, 6, 4, 6
What is the 75th percentile?

 5 6 12 8 none of the above

4 points

### QUESTION 4

1. The frequency distribution below shows the yearly income distribution of
a sample of 100 residents in a county.

Find the average yearly income based on this sample.

 32 30 32.5 27.5 28

4 points

### QUESTION 5

1. Assume a sample space is given as:
S = {E1, E2, E3, E4, E5, E6, E7}
and the following probabilities are assigned to the sample points.
P(E1) = 0.01
P(E2) = 0.19
P(E3) = 0.30
P(E4) = 0.20
P(E5) = 0.20
P(E6) = .05
P(E7) = .05Total=1.00
LetA = {E1, E3, E6}
B = {E2, E3}
C = {E1, E2, E4, E7}
Find P (A/B)

 .30 .40 .49 .61 none of the above

4 points

### QUESTION 6

1. Assume a sample space is given as:
S = {E1, E2, E3, E4, E5, E6, E7}
and the following probabilities are assigned to the sample points.
P(E1) = 0.01
P(E2) = 0.19
P(E3) = 0.30
P(E4) = 0.20
P(E5) = 0.20
P(E6) = .05
P(E7) = .05Total=1.00
Let
A = {E1, E3, E6}
B = {E2, E3}
C = {E1, E2, E4, E7}

Find P (A U C)

 .36 .61 .49 .80 none of the above

4 points

### QUESTION 7

1. Assume a sample space is given as
S = {E1, E2, E3, E4, E5}
and the following probabilities are assigned to the sample points.

P(E1) = 0.05
P(E2) = 0.20
P(E3) = 0.40
P(E4) = 0.30
P(E5) = 0.05Total = 1.00
Let
A = {E1, E3, E5}
B = {E2, E3}
C = {E1, E2, E4}

Find P(B ∩ C)

 0.4 0.49 0.59 0.5 0.2

4 points

### QUESTION 8

1. A large corporation receives express mail deliveries at its main office
in New York daily. The express mail is delivered by two firms: Fad
Express and Emerald. From recent corporate data, 60 percent of the
deliveries are made by Fad Express and 40 percent by Emerald. Both
companies guarantee delivery by 11 a.m. Also, based on recent data given
that Fad Express made the delivery, the probability it was late (i.e. arrived
after 11 a.m.) is 0.10 and if Emerald made the delivery, the
probability that it was late is 0.20. An express mail delivery arrived late in
the main office in New York. What is the posterior probability that it was
delivered by Emerald?

 0.6 0.4 0.57 0.14 0.08

4 points

### QUESTION 9

1. A survey of a sample of business students resulted in the following
information regarding the genders of the individuals and their selected
major.

What is the probability of selecting an individual who is majoring in Marketing?

 .25 .15 .39 .50 none of the above

4 points

### QUESTION 10

1. In a population of 1,000 subjects, 800 are unemployed. In the same population, 700 of the subjects are males. Of the males, 600 are unemployed.. Let M= the event that a person is male and E= the event that a person is employed. Suppose that a person is picked at random.
What is the probability that the person is a female, given that the person is unemployed?

 .20 32 .50 .25 none of the above

4 points

### QUESTION 11

1. A market research study is being conducted to determine if a product
modification will be received well by the public. A total of 1,000 consumers
are questioned regarding this product. The table below provides information
regarding this sample.

What is the probability that a randomly selected person would be a female who also had a positive reaction?

 .20 .30 .45 .26 none of the above

4 points

### QUESTION 12

1. A survey of 800 college seniors resulted in the following cross tabulation regarding their undergraduate major and whether or not they plan to go to graduate school.

What is the probability of selecting a senior who is neither an Engineering major nor a Business major?

 .80 .42 .21 .32 none of the above

4 points

### QUESTION 13

1. The hourly wages of a sample of 8 employees in a corporation is given below
10,7,13,15,10,8,20,21
What is the sample standard deviation?

 13.78 10 5.29 8.70 none of the above

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