Exam 6: Discrete Probability Distributions

To construct a binomial distribution we need to know the ___________ and the probability of a success.

A discrete variable may assume fractional or decimal values,but they must have distance between them.

Sixty percent of the customers of a fast food chain order a hamburger,french fries and a drink.If a random sample of 15 cash register receipts is selected,what is the probability that 10 or more will show that the above three food items were ordered?

For the following distribution, -What is the variance of the distribution?

Which of the following is correct about a probability distribution?

If Unique Buying Services has 100 employees,there might be 0,or 1,or 2,or 3,or up to 100 employees absent on Monday.In this case,the day of the week is the random variable.

The random variable for a Poisson probability distribution can assume an infinite number of values.

Sponsors of a local charity decided to attract wealthy patrons to its $500-a-plate dinner by allowing each patron to buy a set of 20 tickets for the gaming tables.The chance of winning a prize for each of the 20 plays is 50-50.If you bought 20 tickets,what is the chance of winning 15 or more prizes?

Sweetwater & Associates write weekend trip insurance at a very nominal charge.Records show that the probability that a motorist will have an accident during the weekend and file a claim is 0.0005.Suppose they wrote 400 policies for the coming weekend,what is the probability that exactly two claims will be filed?

A tennis match requires that a player win three of five sets to win the match.If a player wins the first two sets,what is the probability that the player wins the match,assuming that each player is equally likely to win each match?

The probabilities and the number of automobiles lined up at a Lakeside Olds at opening time (7:30 a.m. )for service are On a typical day,how many automobiles should Lakeside Olds expect to be lined up at opening?

The production department has installed a new spray machine to paint automobile doors.As is common with most spray guns,unsightly blemishes often appear because of improper mixture or other problems.A worker counted the number of blemishes on each door.Most doors had no blemishes;a few had one;a very few had two,and so on.The average number was 0.5 per door.The distribution of blemishes followed the Poisson distribution.Out of 10,000 doors painted,about how many would have no blemishes?

If we toss two coins and count the number of heads,there could be 0,1 or 2 heads.The number of heads resulting from this experiment is a random variable.

Which one of the following is NOT a condition of the binomial distribution?

A probability distribution is a listing of the expected outcomes of an experiment and the probability of each outcome occurring.What is the sum of the probabilities? _____

How many experimental outcomes are possible for the binomial and the Poisson distributions? _______

For the following distribution, -What is the mean of the distribution?

A random variable represents the outcomes of an experiment.

A machine shop has 100 drill presses and other machines in constant use.The probability that a machine will become inoperative during a given day is 0.002.During some days no machines are inoperative,but during some days,one,two,three or more are broken down.What is the probability that fewer than two machines will be inoperative during a particular day?

A continuous random variable can assume one of an ____________ number of values within a specific range.