Questions from Statistical Techniques

Q: A mail-order company counted the number of incoming calls per

A mail-order company counted the number of incoming calls per day to the company’s toll-free number during the first 7 days in May: 14, 24, 19, 31, 36, 26, 17. (a) Compute the arithmetic mean and (b)...

Q: A quality control inspector selects a part to be tested. The

A quality control inspector selects a part to be tested. The part is then declared acceptable, repairable, or scrapped. Then another part is tested. List the possible outcomes of this experiment regar...

Q: The following is a list of 29 hospitals in the Cincinnati,

The following is a list of 29 hospitals in the Cincinnati, Ohio, and Northern Kentucky region. Each hospital is assigned a number, 00 through 28. The hospitals are classified by type, either a general...

Q: A small business consultant is investigating the performance of several companies.

A small business consultant is investigating the performance of several companies. The fourth-quarter sales for last year (in thousands of dollars) for the selected companies were: Company __________...

Q: A firm will promote two employees out of a group of six

A firm will promote two employees out of a group of six men and three women. a. List all possible outcomes. b. What probability concept would be used to assign probabilities to the outcomes?

Q: The box plot shows the undergraduate in-state tuition per credit

The box plot shows the undergraduate in-state tuition per credit hour at four-year public colleges. a. Estimate the median. b. Estimate the first and third quartiles. c. Determine the interquartile...

Q: Aloha Banking Co. is studying ATM use in suburban Honolulu.

Aloha Banking Co. is studying ATM use in suburban Honolulu. Yesterday, for a sample of 30 ATM's, the bank counted the number of times each machine was used. The data is presented in the table. Develop...

Q: Assume a binomial distribution where n = 5 and π = .

Assume a binomial distribution where n = 5 and π = .30. a. Refer to Appendix B.1 and list the probabilities for values of x from 0 to 5. b. Determine the mean and standard deviation of the distributio...

Q: The U.S. Postal Service reports 95% of first

The U.S. Postal Service reports 95% of first-class mail within the same city is delivered within 2 days of the time of mailing. Six letters are randomly sent to different locations. a. What is the pro...

Q: A normal population has a mean of 75 and a standard deviation

A normal population has a mean of 75 and a standard deviation of 5. You select a sample of 40. Compute the probability the sample mean is: a. Less than 74. b. Between 74 and 76. c. Between 76 and 77....