Questions from Engineering Statistics

Q: Case Study: Consider the data set for Exercise 12.12

Case Study: Consider the data set for Exercise 12.12, page 452 (hospital data), repeated here. (c) Comment on what other analyses should be run. (d) Run appropriate analyses and write your conclus...

Q: A set of experimental runs was made to determine a way of

A set of experimental runs was made to determine a way of predicting cooking time y at various values of oven width x1 and flue temperature x2. The coded data were recorded as follows: Estimate the...

Q: The following data are given: / (

The following data are given: (a) Fit the cubic model μY |x = β0+β1x+β2x2+β3x3. (b) Predict Y when x = 2.

Q: The following data reflect information from 17 U.S. Naval

The following data reflect information from 17 U.S. Naval hospitals at various sites around the world. The regressors are workload variables, that is, items that result in the need for personnel in a...

Q: A study was performed on a type of bearing to find the

A study was performed on a type of bearing to find the relationship of amount of wear y to x1 = oil viscosity and x2 = load. The following data were obtained. (From Response Surface Methodology, Myers...

Q: Eleven student teachers took part in an evaluation program designed to measure

Eleven student teachers took part in an evaluation program designed to measure teacher effectiveness and determine what factors are important. The response measure was a quantitative evaluation of the...

Q: The personnel department of a certain industrial firm used 12 subjects in

The personnel department of a certain industrial firm used 12 subjects in a study to determine the relationship between job performance rating (y) and scores on four tests. The data are as follows:...

Q: The daily profit from a juice vending machine placed in an office

The daily profit from a juice vending machine placed in an office building is a value of a normal random variable with unknown mean μ and variance σ2. Of course, the mean will vary somewhat from build...

Q: An engineer at a semiconductor company wants to model the relationship between

An engineer at a semiconductor company wants to model the relationship between the gain or hFE of a device (y) and three parameters: emitter-RS (x1), base-RS (x2), and emitter-to-base-RS (x3). The dat...

Q: For the data of Exercise 12.2 on page 450,

For the data of Exercise 12.2 on page 450, estimate σ2. Exercise 12.2: In Applied Spectroscopy, the infrared reflectance spectra properties of a viscous liquid used in the electronics indu...