Questions from Engineering Statistics

Q: An investigation was conducted to determine the source of reduction in yield

An investigation was conducted to determine the source of reduction in yield of a certain chemical product. It was known that the loss in yield occurred in the mother liquor, that is, the material rem...

Q: In the study An Evaluation of the Removal Method for Estimating Benthic

In the study An Evaluation of the Removal Method for Estimating Benthic Populations and Diversity conducted by Virginia Tech on the Jackson River, 5 different sampling procedures were used to determin...

Q: The following data are values of pressure (psi) in a

The following data are values of pressure (psi) in a torsion spring for several settings of the angle between the legs of the spring in a free position: Compute a one-way analysis of variance for t...

Q: It is suspected that the environmental temperature at which batteries are activated

It is suspected that the environmental temperature at which batteries are activated affects their life. Thirty homogeneous batteries were tested, six at each of five temperatures, and the data are sho...

Q: The data in the following table represent the number of hours of

The data in the following table represent the number of hours of relief provided by five different brands of headache tablets administered to 25 subjects experiencing fevers of 38â—¦...

Q: A random variable X follows an exponential distribution with mean 1/

A random variable X follows an exponential distribution with mean 1/β. Assume the prior distribution of β is another exponential distribution with mean 2.5. Determine the Bayes estimate of β under the...

Q: The following table (from A. Hald, Statistical Theory with

The following table (from A. Hald, Statistical Theory with Engineering Applications, John Wiley & Sons, New York, 1952) gives tensile strengths (in deviations from 340) for wires taken from nine c...

Q: The printout in Figure 13.5 on page 532 gives information

The printout in Figure 13.5 on page 532 gives information on Duncan’s test, using PROC GLM in SAS, for the aggregate data in Example 13.1. Give conclusions regarding paired compariso...

Q: Do Duncan’s test for paired comparisons for the data of Exercise 13

Do Duncan’s test for paired comparisons for the data of Exercise 13.6 on page 519. Discuss the results. Exercise 13.6: A study measured the sorption (either absorption or adsorption...

Q: In a biological experiment, four concentrations of a certain chemical are

In a biological experiment, four concentrations of a certain chemical are used to enhance the growth of a certain type of plant over time. Five plants are used at each concentration, and the growth in...