Can you check these questions for me?

FratBro23
Category:
Statistics
Price: $5 USD

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?

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?

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?

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.

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)

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)

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)

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?

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?

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?

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?

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?

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?


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