Questions from Engineering Statistics

Q: A paint supplier claims that a new additive will reduce the drying

A paint supplier claims that a new additive will reduce the drying time of its acrylic paint. To test this claim, 12 panels of wood were painted, one-half of each panel with paint containing the regul...

Q: It is claimed that a new diet will reduce a person’s weight

It is claimed that a new diet will reduce a person’s weight by 4.5 kilograms, on average, in a period of 2 weeks. The weights of 10 women were recorded before and after a 2-week peri...

Q: Two types of instruments for measuring the amount of sulfur monoxide in

Two types of instruments for measuring the amount of sulfur monoxide in the atmosphere are being compared in an air-pollution experiment. The following readings were recorded daily for a period of 2 w...

Q: The following figures give the systolic blood pressure of 16 joggers before

The following figures give the systolic blood pressure of 16 joggers before and after an 8-kilometer run: Use the sign test at the 0.05 level of significance to test the null hypothesis that jogging...

Q: Analyze the data of Exercise 16.1 by using the signed

Analyze the data of Exercise 16.1 by using the signed-rank test. Exercise 16.1: The following data represent the time, in minutes, that a patient has to wait during 12 visits to a doctorâ€...

Q: Analyze the data of Exercise 16.2 by using the signed

Analyze the data of Exercise 16.2 by using the signed-rank test. Exercise 16.2: The following data represent the number of hours of flight training received by 18 student pilots from a certain instru...

Q: Consider X1,X2, . . . , Xn independent Poisson

Consider X1,X2, . . . , Xn independent Poisson random variables with parameters μ1, μ2, . . . , μn. Use the properties of moment-generating functions to show...

Q: A quality control effort is being undertaken for a process where large

A quality control effort is being undertaken for a process where large steel plates are manufactured and surface defects are of concern. The goal is to set up a quality control chart for the number of...

Q: Rework Exercise 16.5 by using the signed-rank test

Rework Exercise 16.5 by using the signed-rank test. Exercise 16.5: It is claimed that a new diet will reduce a person’s weight by 4.5 kilograms, on average, in a period of 2 weeks....

Q: Assuming that the measurements of Exercise 1.14 on page 30

Assuming that the measurements of Exercise 1.14 on page 30 were recorded successively from left to right as they were collected, use the runs test, with α = 0.05, to test the hypothesis that the data...