Questions from Engineering Statistics

Q: Organic arsenicals are used by forestry personnel as silvicides. The amount

Organic arsenicals are used by forestry personnel as silvicides. The amount of arsenic that the body takes in when exposed to these silvicides is a major health problem. It is important that the amoun...

Q: Scientists in the Department of Plant Pathology at Virginia Tech devised an

Scientists in the Department of Plant Pathology at Virginia Tech devised an experiment in which 5 different treatments were applied to 6 different locations in an apple orchard to determine if there w...

Q: In the paper “Self-Control and Therapist Control in the

In the paper “Self-Control and Therapist Control in the Behavioral Treatment of Overweight Women,” published in Behavioral Research and Therapy (Vol. 10, 1972), two...

Q: In the book Design of Experiments for the Quality Improvement, published

In the book Design of Experiments for the Quality Improvement, published by the Japanese Standards Association (1989), a study on the amount of dye needed to get the best color for a certain type of f...

Q: An experiment was conducted to compare three types of coating materials for

An experiment was conducted to compare three types of coating materials for copper wire. The purpose of the coating is to eliminate “flaws” in the wire. Ten differe...

Q: Testing patient blood samples for HIV antibodies, a spectrophotometer determines the

Testing patient blood samples for HIV antibodies, a spectrophotometer determines the optical density of each sample. Optical density is measured as the absorbance of light at a particular wavelength....

Q: An experiment is conducted in which 4 treatments are to be compared

An experiment is conducted in which 4 treatments are to be compared in 5 blocks. The data are given below. (a) Assuming a random effects model, test the hypothesis, at the 0.05 level of significanc...

Q: To find out whether a new serum will arrest leukemia, nine

To find out whether a new serum will arrest leukemia, nine patients, who have all reached an advanced stage of the disease, are selected. Five patients receive the treatment and four do not. The survi...

Q: The following data show the effect of 4 operators, chosen randomly

The following data show the effect of 4 operators, chosen randomly, on the output of a particular machine. (a) Perform a random effects analysis of variance at the 0.05 level of significance. (b)...

Q: Immobilization of free-ranging white-tailed deer by drugs allows

Immobilization of free-ranging white-tailed deer by drugs allows researchers the opportunity to closely examine the deer and gather valuable physiological information. In the study Influence of Physic...