Pratice+Test+1B

# Pratice+Test+1B - 1 What is the scale of measurement for...

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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 (percent-per-unit/relative- frequency-per-unit) 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 asking about the moment about the origin not the moment about the mean.

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