Questions from Business Statistics

Q: The following are quality control data for a manufacturing process at Kensport

The following are quality control data for a manufacturing process at Kensport Chemical Company. The data show the temperature in degrees centigrade at five points in time during a manufacturing cycle...

Q: The following were collected for the Master Blend Coffee production process.

The following were collected for the Master Blend Coffee production process. The data show the filling weights based on samples of 3-pound cans of coffee. Use these data to construct the xÌ ...

Q: An insurance company samples claim forms for errors created by its employees

An insurance company samples claim forms for errors created by its employees as well as the amount of time it takes to process a claim. a. When the process is in control, the proportion of claims with...

Q: Managers of 1200 different retail outlets make twice-a-month

Managers of 1200 different retail outlets make twice-a-month restocking orders from a central warehouse. Past experience shows that 4% of the orders result in one or more errors such as wrong item shi...

Q: According to the IRS, taxpayers calling the IRS in 2017 waited

According to the IRS, taxpayers calling the IRS in 2017 waited 13 minutes on average for an IRS telephone assister to answer. Do callers who use the IRS help line early in the day have a shorter wait?...

Q: An n = 10, c = 2 acceptance sampling plan is

An n = 10, c = 2 acceptance sampling plan is being considered; assume that p0 = .05 and p1 = .20. a. Compute both producer’s and consumer’s risk for this acceptance sampling plan. b. Would the produce...

Q: An acceptance sampling plan with n = 15 and c = 1

An acceptance sampling plan with n = 15 and c = 1 has been designed with a producer’s risk of .075. a. Was the value of p0 .01, .02, .03, .04, or .05? What does this value mean? b. What is the consume...

Q: A manufacturer produces lots of a canned food product. Let p

A manufacturer produces lots of a canned food product. Let p denote the proportion of the lots that do not meet the product quality specifications. An η = 25, c = 0 acceptance sampling plan will be us...

Q: Samples of size 5 provided the following 20 sample means for a

Samples of size 5 provided the following 20 sample means for a production process that is believed to be in control. a. Based on these data, what is an estimate of the mean when the process is in co...

Q: Many factors influence the retail price of gasoline. The following table

Many factors influence the retail price of gasoline. The following table shows the average retail price for a gallon of regular grade gasoline for each year from 2014 through 2017 (U.S. Energy Informa...