Questions from Business Statistics

Q: Raaj works at the customer service call center of a major credit

Raaj works at the customer service call center of a major credit card bank. Cardholders call for a variety of reasons, but regardless of their reason for calling, if they hold a platinum card, Raaj is...

Q: Justine works for an organization committed to raising money for Alzheimer research

Justine works for an organization committed to raising money for Alzheimer research. From past experience, the organization knows that about 20% of all potential donors will agree to give something if...

Q: Only 4% of people have Type AB blood. 1

Only 4% of people have Type AB blood. 1. On average, how many donors must be checked to find someone with Type AB blood? 2. What the probability that there is a Type AB donor among the first 5 people...

Q: About 8% of males are color-blind. A researcher

About 8% of males are color-blind. A researcher needs some color-blind subjects for an experiment and begins checking potential subjects. 1. On average, how many men should the researcher expect to ch...

Q: If you flip a fair coin 100 times, 1.

If you flip a fair coin 100 times, 1. Intuitively, how many heads do you expect? 2. Use the formula for expected value to verify your intuition.

Q: An American roulette wheel has 38 slots, of which 18 are

An American roulette wheel has 38 slots, of which 18 are red, 18 are black, and 2 are green (0 and 00). If you spin the wheel 38 times, 1. Intuitively, how many times would you expect the ball to wind...

Q: Assume that 13% of people are left-handed. If

Assume that 13% of people are left-handed. If we select 5 people at random, find the probability of each outcome. 1. The first lefty is the fifth person chosen. 2. There are some lefties among the 5 p...

Q: An Olympic archer is able to hit the bull-eye 80

An Olympic archer is able to hit the bull-eye 80% of the time. Assume each shot is independent of the others. If she shoots 6 arrows, what the probability of each of the following results? 1. Her firs...

Q: Consider our group of 5 people from Exercise 29 . 1

Consider our group of 5 people from Exercise 29 . 1. How many lefties do you expect? 2. With what standard deviation? 3. If we keep picking people until we find a lefty, how long do you expect it will...

Q: Here are the number of domestic flights flown in each year from

Here are the number of domestic flights flown in each year from 2000 to 2016 (www.transtats.bts.gov/homepage.asp): a) Find the correlation of Flights with Year. b) Make a scatterplot and describe the...