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**BUSI 230 Week 4 Review and Exam Liberty University Complete Answers**

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**BUSI 230 Week 4 Review and Exam Liberty University Complete Answers**

**The below shown questions is just one version sample.Download the excel document for the complete solutions. Just put your values in the excel document to get your answers.**

Consider the following two events for an individual.

A = owns a cell phone

B = owns a laptop computer

Translate each event into words.

(a) Ac

Answer

(b) A and B

Answer

(c) A or B

Answer

(d) A | B

Answer

(e) B | A

Does it pay to ask for a raise? A national survey of heads of households showed the percentage of those who asked for a raise and the percentage who got one. According to the survey, of the women interviewed, 22% had asked for a raise, and of those women who had asked for a raise, 45% received the raise. If a woman is selected at random from the survey population of women, find the following probabilities. (Enter your answers to three decimal places.)

(a) P(woman asked for a raise)

**Answer**

(b) P(woman received raise, given she asked for one)

**Answer**

(c) P(woman asked for raise and received raise)

Allergic reactions to poison ivy can be miserable. Plant oils cause the reaction. Researchers at Allergy Institute did a study to determine the effects of washing the oil off within 5 minutes of exposure. A random sample of 1000 people with known allergies to poison ivy participated in the study. Oil from the poison ivy plant was rubbed on a patch of skin. For 500 of the subjects, it was washed off within 5 minutes. For the other 500 subjects, the oil was washed off after 5 minutes. The results are summarized in the following table.

Let's use the following notation for the various events: W = washing oil off within 5 minutes, A = washing oil off after 5 minutes, N = no reaction, M = mild reaction, S = strong reaction. Find the following probabilities for a person selected at random from this sample of 1000 subjects. (Use 3 decimal places.)

(a) P(N)

P(M)

P(S)

(b) P(N | W)

P(S | W)

(c) P(N | A)

P(S | A)

(d) P(N and W)

P(M and W)

(e) P(N or M).

Are the events N = no reaction and M = mild reaction mutually exclusive? Explain.

**Answer**

(f) Are the events N = no reaction and W = washing oil off within 5 minutes independent? Explain.

There is money to send two of seven city council members to a conference in Honolulu. All want to go, so they decide to choose the members to go to the conference by a random process. How many different combinations of two council members can be selected from the seven who want to go to the conference?

To open a combination lock, you turn the dial to the right and stop at a number; then you turn it to the left and stop at a second number. Finally, you turn the dial back to the right and stop at a third number. If you used the correct sequence of numbers, the lock opens. If the dial of the lock contains 7 numbers, 0 through 6, determine the number of different combinations possible for the lock. Note: The same number can be reused consecutively.

What are the requirements for a probability distribution

List the criteria for a binomial experiment. (Select all that apply.)

What does the random variable of a binomial experiment measure?

**BUSI 230 Week 4 Review and Exam Liberty University Complete Answers**

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