Source: Revised GRE PDF 2nd Ed. Section 5; #8 (p. 77)

4

The frequency distributions shown above represent two groups

The frequency distributions shown above represent two groups of data. Each of the data values is a multiple of 10. Quantity A: The standard deviation of distribution A Quantity B: The standard deviation of distribution B Quantity A is greater., Quantity B is greater., The two quantities are equal., The relationship cannot be determined from the information given.

2 Explanations

2

Robert Paul

I picked "B" simply because there was more variability in the distribution of data in B, regardless of what their means were. Not sure if that way of looking at it will always result in a correct answer.

Sep 18, 2014 • Comment

4

Gravatar Chris Lele, Magoosh Tutor

Sep 27, 2012 • Comment

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