5-4

A large company must hire a new president. The Board of Directors prepares a list of five candidates, all of whom are equally qualified. Two of these candidates are members of a minority group. To avoid bias in the selection of the candidate, the company decides to select the president by lottery

What is the probability one of the minority candidates is hired? (Round your answer to 1 decimal place.)
Which concept of probability did you use to make this estimate?

5-14

The chair of the board of directors says, “There is a 50% chance this company will earn a profit, a 30% chance it will break even, and a 20% chance it will lose money next quarter.”

Use an addition rule to find the probability the company will not lose money next quarter. (Round your answer to 2 decimal places.)
Use the complement rule to find the probability it will not lose money next quarter. (Round your answer to 2 decimal places.)

5-22

A National Park Service survey of visitors to the Rocky Mountain region revealed that 50% visit Yellowstone Park, 40% visit the Tetons, and 35% visit both.

What is the probability a vacationer will visit at least one of these attractions? (Round your answer to 2 decimal places.)
What is the probability .35 called?
Are the events mutually exclusive?

5-34

5-40

Solve the following

a.            20! /17!

b.            9P3

c.             7C2

6-4

Which of these variables are discrete and which are continuous random variables

The number of new accounts established by a salesperson in a year.
The time between customer arrivals to a bank ATM
The number of customers in Big Nick’s barber shop.
The amount of fuel in your car’s gas tank.
The number of minorities on a jury.
The outside temperature today.

6-14      

The U.S. Postal Service reports 95% of first-class mail within the same city is delivered within 2 days of the time of mailing. Six letters are randomly sent to different locations.

What is the probability that all six arrive within 2 days
What is the probability that exactly five arrive within 2 days
Find the mean number of letters that will arrive within 2 days
Compute the variance of the number that will arrive within 2 days
Compute the standard deviation of the number that will arrive within 2 days

6-24

In a binomial distribution, n = 12 and π = .60

Find the probability for x = 5
Find the probability for x ≤ 5
Find the probability for x ≤ 5

6-26      

A population consists of 15 items, 10 of which are acceptable

In a sample of four items, what is the probability that exactly three are acceptable? Assume the samples are drawn without replacement. (Round your answer to 4 decimal places.)

7-4

According to the Insurance Institute of America, a family of four spends between $400 and $3,800 per year on all types of insurance. Suppose the money spent is uniformly distributed between these amounts

What is the mean amount spent on insurance
What is the standard deviation of the amount spent?  (Round your answer to 2 decimal places.)
If we select a family at random, what is the probability they spend less than $2,000 per year on insurance per year (Round your answer to 4 decimal places.)
What is the probability a family spends more than $3,000 per year? (Round your answer to 4 decimal places.)

7-10

The mean of a normal probability distribution is 60; the standard deviation is 5. 

a. About what percent of the observations lie between 55 and 65? 

b. About what percent of the observations lie between 50 and 70? 

c. About what percent of the observations lie between 45 and 75? 

7-14

A normal population has a mean of 12.2 and standaLDR 531 Week 2 Quiz 100% Score latest Work,Business & Finance,$10.00,

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