Applied Statistics and Probability for Engineers 6th Edition solutions

Applied Statistics and Probability for Engineers 6
Consider the shear strength experiment described in Example 10-11. (a) Construct a 95% confidence interval on the difference in mean shear strength for the two methods. Is the result you obtained consistent with the findings in Example 10-11? Explain why. (b) Do each of the individual shear s

Applied Statistics and Probability for Engineers 6
Consider the parking data in Example 10-12. (a) Use the paired t-test to investigate the claim that the two types of cars have different levels of difficulty to parallel park. Use \(\alpha=0.10\). (b) Compare your results with the confidence interval constructed in Example 10-12 and comment on why th

Applied Statistics and Probability for Engineers 6
The manager of a fleet of automobiles is testing two brands of radial tires and assigns one tire of each brand at random to the two rear wheels of eight cars and runs the cars until the tires wear out. The data (in kilometers) follow. Find a 99% confidence interval on the difference in mean life. Whi

Applied Statistics and Probability for Engineers 6
A computer scientist is investigating the usefulness of two different design languages in improving programming tasks. Twelve expert programmers who are familiar with both languages are asked to code a standard function in both languages and the time (in minutes) is recorded. The data follow: (a)

Applied Statistics and Probability for Engineers 6
Fifteen adult males between the ages of 35 and 50 participated in a study to evaluate the effect of diet and exercise on blood cholesterol levels. The total cholesterol was measured in each subject initially and then three months after participating in an aerobic exercise program and switching to a l

Applied Statistics and Probability for Engineers 6
An article in the Journal of Aircraft (1986, Vol. 23, pp. 859864) described a new equivalent plate analysis method formulation that is capable of modeling aircraft structures such as cranked wing boxes and that produces results similar to the more computationally intensive finite element analysis met

Applied Statistics and Probability for Engineers 6
Ten individuals have participated in a diet-modification program to stimulate weight loss. Their weight both before and after participation in the program is shown in the following list. Subject Before After 1 195 187 2 213 195 3 247 221 4 201 190 5 187 175 6 210 197 7 215 19

Applied Statistics and Probability for Engineers 6
Two different analytical tests can be used to determine the impurity level in steel alloys. Eight specimens are tested using both procedures, and the results are shown in the following tabulation. Specimen Test Test 2 1 1.2 1.4 2 1.3 1.7 3 1.5 1.5 4 1.4 1.3 5 1.7 2.0 6 1.8 2.1

Applied Statistics and Probability for Engineers 6
An article in Neurology (1998, Vol. 50, pp. 12461252) discussed that monozygotic twins share numerous physical, psychological, and pathological traits. The investigators measured an intelligence score of 10 pairs of twins, and the data follow: (a) Is the assumption that the difference in score is

Applied Statistics and Probability for Engineers 6
In Biometrics (1990, Vol. 46, pp. 67387), the authors analyzed the circumference of i ve orange trees (labeled as AE) measured on seven occasions \((x_i)\). (a) Compare the mean increase in circumference in periods 1 to 2 to the mean increase in periods 2 to 3. The increase is the differe

Applied Statistics and Probability for Engineers 6
Use the sign test on the blood cholesterol data in Exercise 10-53. Is there evidence that diet and exercise reduce the median cholesterol level?

Applied Statistics and Probability for Engineers 6
Repeat Exercise 10-59 using the Wilcoxon signed-rank test. State carefully what hypothesis is being tested and how it differs from the one tested in Exercise 10-59.

Applied Statistics and Probability for Engineers 6
Neuroscientists conducted research in a Canadian prison to see whether solitary confinement affects brain wave activity [Changes in EEG Alpha Frequency and Evoked Response Latency During Solitary Confinement, Journal of Abnormal Psychology 1972, Vol. 7, pp. 5459]. They randomly assigned 20 inmates to

Applied Statistics and Probability for Engineers 6
Problem 62E In a series of tests to study the efficacy of ginkgo biloba on memory, Solomon et al. first looked at differences in memory tests of people six weeks before and after joining the study [Ginkgo for Memory Enhancement: A Randomized Controlled Trial, Journal of the American Medical Associa