Final Exam Essay

3105 Words Apr 9th, 2013 13 Pages
Complete the final exam offline during the final exam week. Once you have complete the exam, input your exam into the final exam shell in the exam folder on the course webpage. Good luck




US Census statistics show that college graduates make more than $254,000 more in their lifetime than non-college graduates. If you were to question the validity of this observation, what would be your basis for doing so?
A. Definition of a college graduate
B. Work lifestyles of the population
C. Defining “lifetime”
D. How the Census was taken
The average age in a sample of 190 students at City College is 22. As a result of this sample, it can be concluded that the average age of all the
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Furthermore, events A and B are mutually exclusive. Which of the following statements is also true?
A. A and B are also independent.
B. P(A or B) = P(A)P(B)
C. P(A or B) = P(A) + P(B)
D. P(A and B) = P(A) + P(B)


Twenty-five percent of the employees of a large hospital are minorities. A random sample of 7 employees is selected.


What is the probability that the sample contains exactly 4 minorities? ____
What is the probability that the sample contains fewer than 2 minorities? ____
What is the probability that the sample contains exactly 1 non-minority? ____
What is the expected number of minorities in the sample? ______
What is the variance of the minorities? _______

Select from the answers below. Place the correct letter in the blanks above.
A. 0.5551
B. 1.1456
C. 0.4449
D. 0.0013 E. 1.7226
F. 1.3125
G. 0.0577
H. .0001
I. 1.75
J. 0.0286
The life expectancy of a lung cancer patient treated with a new drug is normally distributed with a mean of 4 years and a standard deviation of 10 months.
A. What is the probability that a randomly selected lung cancer patient will last more than 5 years? _____
B. What percentage of lung cancer patients will last between 5 and 6 years? ____
C. What percentage of

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