Questions from Engineering Statistics

Q: During bad economic times, industrial workers are dismissed and are often

During bad economic times, industrial workers are dismissed and are often replaced by machines. The history of 100 workers whose loss of employment is attributable to technological advances is reviewe...

Q: There is a 50-50 chance that the queen carries the

There is a 50-50 chance that the queen carries the gene of hemophilia. If she is a carrier, then each prince has a 50-50 chance of having hemophilia independently. If the queen is not a carrier, the p...

Q: For the data of Exercise 1.4 on page 13,

For the data of Exercise 1.4 on page 13, compute both the mean and the variance in “flexibility” for both company A and company B. Does there appear to be a differe...

Q: Consider the data in Exercise 1.5 on page 13.

Consider the data in Exercise 1.5 on page 13. Compute the sample variance and the sample standard deviation for both control and treatment groups. Data in Exercise 1.5: Twenty adult males between the...

Q: A national study that examined attitudes about antidepressants revealed that approximately 70

A national study that examined attitudes about antidepressants revealed that approximately 70% of respondents believe “antidepressants do not really cure anything; they just cover up the real trouble....

Q: For Exercise 1.6 on page 13, compute the sample

For Exercise 1.6 on page 13, compute the sample standard deviation in tensile strength for the samples separately for the two temperatures. Does it appear as if an increase in temperature influences t...

Q: A manufacturer of electronic components is interested in determining the lifetime of

A manufacturer of electronic components is interested in determining the lifetime of a certain type of battery. A sample, in hours of life, is as follows: 123, 116, 122, 110, 175, 126, 125, 111, 118,...

Q: A tire manufacturer wants to determine the inner diameter of a certain

A tire manufacturer wants to determine the inner diameter of a certain grade of tire. Ideally, the diameter would be 570 mm. The data are as follows: 572, 572, 573, 568, 569, 575, 565, 570. (a) Find t...

Q: Five independent coin tosses result in HHHHH. It turns out that

Five independent coin tosses result in HHHHH. It turns out that if the coin is fair the probability of this outcome is (1/2)5 = 0.03125. Does this produce strong evidence that the coin is not fair? C...

Q: Show that the n pieces of information in are not independent;

Show that the n pieces of information in