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Assume that you are the owner of a small business that employs two people on a telephone help desk. Records show that one of the employees is busy
The ages of the volunteer members of fire department are normally distributed with a mean of 36 and a standard deviation of 6. What is the probability
A wildlife biologist captures a certain species of geese in orer to weigh them. Using science, he determines that the weights are normally distributed
On February 8, 2002, the Gallup Organization released the results of a poll concerning American attitudes
A videotape store has an average weekly gross of $1,158 with a standard deviation of $120. Assuming this to be a normally distributed random variable
A survey revealed that 21.5% of the households had no checking account, 66.9% had regular checking accounts, and 11.6% had NOW accounts
Because of a recent incident in which a number of people became ill after eating undercooked hamburger meat, intensive interest has centered
The Census Bureau reports that 55% of all 3-to-5-year-old children attended preschool programs at least a portion of the day.
On any given day the number of leasable square feet of office space available in a small city is a normally distributed random variable witha mean of 850,000
A software distributor is considering whether to purchase a batch of 20,000 3.5" floppy disks at a flea market auction for 4 cents each
A retail grocer has decided to market organic "health food" and will purchase a new line of products from each of two suppliers
The city of a particular community consists of five elected residents of the community, two of whom are land developers.
Bill flips a coin that can land heads or tails, and you assign equal probabilities to each, with all flips mutually irrelevant
A person rolls a pair of six-sided dice, which are equally likely to come up any number from 1 to 6. If the person rolls a seven he gets $0.
Your troop's past cookie sales went sour last year. Parents had to bail you and your troop member out of the hole.
Find the value of (a) in the following discrete probability distribution:
At a computer manufacturing company, the actual size of computer chips is normally distributed with a mean of 1 centimeter and a standard deviation of 0.1
A southern state has an unemployment rate of 6%. The state conducts monthly surveys in order to track the unemployment rate
Determine if the normal approximation to the binomial distribution could be used for the following problems:
Find the probabilities for the standard normal random variable z: P(-1.55
A geological study indicates that wells drilled in a certain area should strike water with probability 0.2. Find the probability that:
A factory employs several thousand workers, of whom 30% are Hispanic. If the 15 members of the union executive committee were chosen from the workers at random
If the parents have 5 children, the number who have type O blood is a random variable X that has the binomial distribution with n=5 and p=0.25
An electric power trading company has an option to buy 1,000,000 terawatts of electricity from a producer for $10 per terawatt.
If a coin is tossed three times, the likelihood of obtaining three heads in a row is