Questions from Applied Statistics

Q: What is the difference between an attribute control chart and a variable

What is the difference between an attribute control chart and a variable control chart?

Q: (a) What determines sampling frequency? (b) Why

(a) What determines sampling frequency? (b) Why are variable samples often small? (c) Why are attribute samples often large?

Q: Why is the quality improvement process never-ending? Identify the

Why is the quality improvement process never-ending? Identify the steps of one improvement cycle identified in the textbook.

Q: In a study of stock prices from 1970 to 1994, the

In a study of stock prices from 1970 to 1994, the correlation between Nasdaq closing prices on successive days (i.e., with a 1-day lag) was r = .13 with a t statistic of 5.47. Interpret this result. (...

Q: Describe two quality improvement tools unique to the service industry.

Describe two quality improvement tools unique to the service industry.

Q: Tell if each statement is true or false for a simple regression

Tell if each statement is true or false for a simple regression. If false, explain. a. If the standard error is syx = 3,207, then a residual ei = 4,327 would be an outlier. b. In a regression with n...

Q: Give the type of measurement (nominal, ordinal, interval,

Give the type of measurement (nominal, ordinal, interval, ratio) for each variable. a. Length of time required for a randomly chosen vehicle to cross a toll bridge. b. Student’s ranking of five cell...

Q: Which is not a characteristic of using a log scale to display

Which is not a characteristic of using a log scale to display time series data? Explain. a. A log scale helps if we are comparing changes in two time series of dissimilar magnitude. b. General busine...

Q: Which statement is incorrect? Explain. a. The triangular

Which statement is incorrect? Explain. a. The triangular always has a single mode. b. The mean of the triangular is (a + b + c)/3. c. The triangular cannot be skewed left or right.

Q: Tell if each variable is continuous or discrete. a

Tell if each variable is continuous or discrete. a. Tonnage carried by an oil tanker at sea. b. Wind velocity at 7 o’clock this morning. c. Number of text messages you received yesterday.