Questions from Applied Statistics

Q: (a) Make a frequency distribution and histogram for the 2007

(a) Make a frequency distribution and histogram for the 2007 annual compensation of 40 randomly chosen CEOs (millions of dollars). (b) Describe the shape of the histogram. (c) Identify any unusual val...

Q: For each frequency distribution, suggest “nice” bins. Did

For each frequency distribution, suggest “nice” bins. Did your choice agree with Sturges’ Rule? If not, explain. a. Last week’s MPG for 35 student vehicles (xmin = 9.4, xmax = 38.7). b. Ages of 50 ai...

Q: Convert each individual data value to a standardized z-score.

Convert each individual data value to a standardized z-score. Is it an outlier? a. Ages of airline passengers: x = 92, μ = 46, σ = 13 b. Accounting exam scores: x = 70, μ = 81, σ = 6 c. Condo rental...

Q: Convert each individual X data value to a standardized Z value and

Convert each individual X data value to a standardized Z value and interpret it.

Q: In a regional high school swim meet, women’s times (in

In a regional high school swim meet, women’s times (in seconds) in the 200-yard freestyle ranged from 109.7 to 126.2. Estimate the standard deviation, using the Empirical Rule.

Q: Find the original data value corresponding to each standardized z-score

Find the original data value corresponding to each standardized z-score.

Q: CitiBank recorded the number of customers to use a downtown ATM during

CitiBank recorded the number of customers to use a downtown ATM during the noon hour on 32 consecutive workdays. (a) Use Excel or MegaStat to sort and standardize the data. (b) Based on the Empirical...

Q: An executive’s telephone log showed the lengths of 65 calls initiated during

An executive’s telephone log showed the lengths of 65 calls initiated during the last week of July. (a) Use Excel or MegaStat to sort and standardize the data. (b) Based on the stand...

Q: A random sample of 10 items is drawn from a population whose

A random sample of 10 items is drawn from a population whose standard deviation is unknown. The sample mean is xbar = 270 and the sample standard deviation is s = 20. Use Appendix D to find the values...

Q: (a) For each data set, find the mean,

(a) For each data set, find the mean, median, and mode. (b) Discuss anything about the data that affects the usefulness of each statistic as a measure of center.