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Question

$8.00 Statistics

From Mathematics: Statistics
Closed, but you can still post tutorials
Due on Jan. 13, 2012
Asked on Jan 11, 2012 at 4:28:02PM

Asked by :

colinwilk

Rating :No Rating
Questions Asked: 9
Tutorials Posted: 0

3. Joe is considering pursuing an MBA degree. He has applied to two different universities. The acceptance rate for applicants with similar qualifications is 25% for University A and 40% for University B.
What is the probability that Joe will not be accepted at either university? (Points : 4)
       0.75
       0.45
       0.90
       0.65
       0.60

4. In a report on high school graduation, it was stated that 85% of high school students graduate. Suppose 3 high school students are randomly selected from different schools.
What is the probability that all graduate? (Points : 4)
       0.85
       0.947
       0.614
       0.283
       0.003

6. A large disaster cleaning company estimates that 30% of the jobs it bids on are finished within the bid time. Looking at a random sample of 8 jobs that is has contracted:
Calculate the mean number of jobs completed within the bid time. (Points : 3)
       4.0
       2.4
       2.0
       5.6

7. Your companys internal auditor believes that 10% of the company's invoices contain errors. To check this theory, 20 invoices are randomly selected and 5 are found to have errors. What is the probability that of the 20 invoices written, five or more would contain errors if the theory is valid?
       .0433
       .0319
       .9567
       .8660

8. An important part of the customer service responsibilities of a cable company relates to the speed with which trouble in service can be repaired. Historically, the data show that the likelihood is 0.75 that troubles in a residential service can be repaired on the same day. For the first five troubles reported on a given day, what is the probability that: Fewer than two troubles will be repaired on the same day? (Points : 3)
       .6328
       .0010
       .0156
       .0146

9. In a study conducted by a local university, it was found that 25% of college freshmen support increased military spending. If 6 college freshmen are randomly selected, find the probability that:
Fewer than 4 support increased military spending (Points : 3)
       .0330
       .7844
       .9624
       .9954

10. A multiple-choice test has 30 questions and each one has five possible answers, of which one is correct. If all answers were guesses, find the probability of getting exactly four correct answers. (Points : 3)
       .0604
       .1325
       .2552
       .8000