A company has test-marketed three new types of soup in selected stores over a period of 1 year. The following table records sales achieved (in thousands of dollars) for each of the three soups in each quarter of the year.
a. Prepare the two-way analy..
A company has three divisions, and auditors are attempting to estimate the total amounts of the company’s accounts receivable. Random samples of these accounts were taken for each of the three divisions, yielding the results shown in the following ta..
A company has three subdivisions, employing a total of 970 managers. Independent random samples of managers were taken from each subdivision, and the number of years with the company was determined for each sample member. The results are summarized i..
A company has two assembly lines, each of which stalls an average of 2.4 times per week according to a Poisson distribution. Assume that the performances of these assembly lines are independent of one another. What is the probability that at least on..
A company installs new central-heating furnaces and has found that for 15% of all installations, a return visit is needed to make some modifications. Six installations were made in a particular week. Assume independence of outcomes for these installa..
A company is attempting to determine if it should retain a previously popular shoe model. A random sample of women is obtained, and each person in the sample is asked if she would purchase this existing shoe model. To determine if the old shoe model ..
A company is experiencing a poor inventory management situation and receives alternative research proposals. Proposal 1 is to use an audit of last year’s transactions as a basis for recommendations. Proposal 2 is to study and recommend changes to the..
A company knows that a rival is about to bring out a competing product. It believes that this rival has three possible packaging plans (superior, normal, and cheap) in mind and that all are equally likely. Also, there are three equally likely possib..
A company places a rush order for wire of two thicknesses.
Consignments of each thickness are to be sent immediately when they are available. Previous experience suggests that the probability is 0.8 that at least one of these consignments will arrive..
A company produces breakfast cereal. The true mean weight of the contents of its cereal packages is 20 ounces, and the standard deviation is 0.6 ounce. The population distribution of weights is normal. Suppose that you purchase four packages, which c..
A company produces electric devices operated by a thermostatic control. The standard deviation of the temperature at which these controls actually operate should not exceed 2.0°F. For a random sample of 20 of these controls, the sample standard devi..
A company receives a shipment of 16 items. A random sample of 4 items is selected, and the shipment is rejected if any of these items proves to be defective.
a. What is the probability of accepting a shipment containing 4 defective items?
b. What is ..
A company receives a very large shipment of components.
A random sample of 16 of these components will be checked, and the shipment will be accepted if fewer than 2 of these components are defective. What is the probability of accepting a shipment co..
A company receives large shipments of parts from two sources. Seventy percent of the shipments come from a supplier whose shipments typically contain 10% defectives, while the remainder are from a supplier whose shipments typically contain 20% defect..