Questions from Essentials of Statistics

Q: In an issue of Science (Vol. 308, No.

In an issue of Science (Vol. 308, No. 5721, p. 483), D. Normile reported on a study from the Japan Statistics Bureau of the 30 industrialize countries in the Organization for Economic Co-operation and...

Q: In the paper “The Smoking Cessation Efficacy of Varying Doses of

In the paper “The Smoking Cessation Efficacy of Varying Doses of Nicotine Patch Delivery Systems 4 to 5 Years Post-Quit Day” (Preventative Medicine, 28, pp. 113–118), D. Daughton et al. discussed the...

Q: The National Association of Colleges and Employers (NACE) conducts surveys

The National Association of Colleges and Employers (NACE) conducts surveys of salary offers to new college graduates and publishes the results in Salary Survey. The following diagram provides boxplots...

Q: Researchers in obesity wanted to compare the effectiveness of dieting with exercise

Researchers in obesity wanted to compare the effectiveness of dieting with exercise against dieting without exercise. Seventy-three patients were randomly divided into two groups. Group 1, composed of...

Q: Consider these sample data: x1 = 12, x2 =

Consider these sample data: x1 = 12, x2 = 8, x3 = 9, x4 = 17. a. Find n. b. Compute Σxi. c. Determine x¯.

Q: Many species of cuckoos are brood parasites. The females lay their

Many species of cuckoos are brood parasites. The females lay their eggs in the nests of smaller bird species, who then raise the young cuckoos at the expense of their own young. Data on the lengths, i...

Q: The members of a population are numbered 1–90.

The members of a population are numbered 1–90. a. Use Table I in Appendix A to obtain an SRS of size 5 from the population. Start at the two-digit number in line number 15 and column numbers 25−26, re...

Q: A study published by E. Anionwu et al. in the

A study published by E. Anionwu et al. in the British Medical Journal (Vol. 282, pp. 283–286) examined the steady-state hemoglobin levels of patients with three different types of sickle cell disease:...

Q: The U.S. Department of Education sponsors a report on

The U.S. Department of Education sponsors a report on educational institutions, including colleges and universities, titled Digest of Education Statistics. Among many of the statistics provided are th...

Q: In an article titled “Great White, Deep Trouble” (

In an article titled “Great White, Deep Trouble” (National Geographic, Vol. 197(4), pp. 2–29), Peter Benchley—the author of JAWS—discussed various aspects of the Great White Shark (Carcharodon carchar...