Vol. 10, No. 10

October 2008

PQ Systems

Pareto: The Ferrari of charts

Quality Quiz: With a video!

Data in everyday life

Six Sigma

Bytes and pieces

FYI: Current releases


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Quality Quiz from Professor Cleary

As president of Automatic Automotives, you have seen your performance metrics improve dramatically. While others disagree, you assume that this has happened because of the quality manager you personally hired, Polly Graff. Polly was using her statistics professor, Dr. Stan Deviation, to answer all questions she may have, but her knowledge is limited indeed.

Occasionally you have had your doubts about Polly, but as long as the company's performance remains consistent and its stock prices high, you don't want to rock the boat by questioning her knowledge. You were chagrined to discover that she has not yet used SQCpack, although the purchasing agent bought it for her several months ago, and that she does not understand the connection between data and analysis. But you have been hopeful that all will go well--even though you overheard a colleague, Ursa Minor, ask her about kurtosis and were appalled to hear her refer Ursa to a dermatologist.

Your question this month involves evaluating Polly’s advice. Is one likely to find kurtosis in the data analysis room or in the pantry? Is it treatable by a dermatologist, or will it require a surgeon? How often can it happen before it becomes dangerous? Will Ursa become an even bigger star?

Before recommending the appropriate steps to be taken, you must first understand the meaning of kurtosis. What is it? Click on the correct response.

a) A scrap problem that affects output.

b) A statistical measure that indicates the peakedness of a data set.

c) A statistical measure that indicates which side of a distribution has the longest "tail."

d) Similar to psoriasis, but more common among younger people.

e) A statistical method that determines the location of mode.

f) A genuine lack of courtesy to office colleagues.


Click here for a more complete video explanation

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