Questions from Business Statistics

Q: Studies have found that women diagnosed with cancer in one breast also

Studies have found that women diagnosed with cancer in one breast also sometimes have cancer in the other breast that was not initially detected by mammogram or physical examination (“mri evaluation o...

Q: A point is randomly selected on the surface of a lake that

A point is randomly selected on the surface of a lake that has a maximum depth of 100 feet. Let x be the depth of the lake at the randomly chosen point. What are possible values of x? Is x discrete or...

Q: A box contains five slips of paper, marked $1,

A box contains five slips of paper, marked $1, $1, $1, $10, and $25. The winner of a contest selects two slips of paper at random and then gets the larger of the dollar amounts on the two slips. Defin...

Q: Airlines sometimes overbook flights. Suppose that for a plane with 100

Airlines sometimes overbook flights. Suppose that for a plane with 100 seats, an airline takes 110 reservations. Define the random variable x as x = the number of people who actually show up for a so...

Q: Suppose that the random variable x = actual weight (in ounces

Suppose that the random variable x = actual weight (in ounces) of a randomly selected package of cereal has the probability distribution described by the density curve pictured here. a. What probabil...

Q: Let x be the amount of time (in minutes) that

Let x be the amount of time (in minutes) that a particular San Francisco commuter will have to wait for a BART train. Suppose that the density curve is as pictured (a uniform distribution): a. What i...

Q: Referring to the previous exercise, let x and y be waiting

Referring to the previous exercise, let x and y be waiting times on two independently selected days. Define a new random variable w by w = x + y, the sum of the two waiting times. The set of possible...

Q: A company receives light bulbs from two different suppliers. Define the

A company receives light bulbs from two different suppliers. Define the variables x and y as x = lifetime of a bulb from Supplier 1 y = lifetime of a bulb from Supplier 2 Five hundred bulbs from ea...

Q: The probability distribution of x, the number of defective tires on

The probability distribution of x, the number of defective tires on a randomly selected automobile checked at a certain inspection station, is given in the following table: a. Calculate the mean valu...

Q: The size of the left upper chamber of the heart is one

The size of the left upper chamber of the heart is one measure of cardiovascular health. When the upper left chamber is enlarged, the risk of heart problems is increased. The paper “left Atrial Size i...