1. What is the scale of measurement for the variable “depth of a lake?”
2. Do cumulative frequencies make sense with every scale of measurement? Please explain.
3. Does a large median imply large range? Does a large range imply a large median? Please
explain.
4. Here is part of a histogram. The vertical scale is a density scale (percentperunit/relative
frequencyperunit) What proportion of the graph is found between 60 and 76? [Keep the
majority of the blank space empty for the answer to question 8].
5. Which is more affected by extreme scores, the second central moment or the third central
moment? Explain in the space above.
6. Estimate the standard deviation for the below distribution.
7. Depending on how you define error, the mean, the median, or the mode can be the best guess.
How is error defined if the median is the best guess? Use the empty space above this question for
your answer.
8. Calculate the second moment around the origin for the data 1, 3, 3, 9. Note: The question is
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 Fall '10
 RajendraM.Patel
 Normal Distribution, Standard Deviation, best guess

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