Which measure of dispersion represents variation from the mean?
A. Spread
B. Outliers
C. Range
D. Standard deviation

letter D. Standard Deviation

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Asked 3/5/2012 9:53:10 PM

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What happens as the number of classes in a histogram decreases?
A. Class intervals become rounder.
B. Central tendency becomes more obvious.
C. We get better resolution of the data
D. Class interval width increases.
**Weegy:** B. Central tendency becomes more obvious. (More)

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Asked 3/5/2012 9:19:31 PM

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On which axis is time plotted on a simple line chart?
A. Either axis
B. On the Y-axis
C. Time is not plotted
D. On the X-axis
**Weegy:** D. On the X-axis **User:** Which statement is true of the y-intercept in the linear regression model?
A. It may be any value.
B. It is always a positive value.
C. The value depends on the slope of the line.
D. It is always zero.
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Asked 3/5/2012 9:21:32 PM

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A linear regression model has a slope of –2.5 and an intercept of 10. The sample coefficient of determination is 0.50. What is the value of the sample correlation coefficient? **Weegy:** A linear regression model has a slope of -2.5 and an intercept of 10. The sample coefficient of determination is 0.50. What is the value of the sample correlation coefficient? Since the slope is negative, even the correlation coefficient is negative. [ Answer: -0.7071. ] (More)

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Asked 3/5/2012 9:26:26 PM

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Which of the following is true of an index?
A. It can employ qualitative data
B. It shows a percent change from one period to another
C. It cannot assume negative values
D. It must be larger than 100
**Weegy:** A. It can employ qualitative data **User:** Which of the following is true of a base period for an index number?
A. It appears in the denominator
B. The numerator spears
C. It must have occurred after the year 1980
D. It cannot be less than 100
**Weegy:** D. It cannot be less than 100
**User:** Which is true about reporting the Consumer Price Index (CPI)?
A. It is reported by the Federal Reserve
B. It is reported bi-annually
C. It reports all commercial prices
D. It is reported by the Bureau of Labor Statistics
**Weegy:** s D. It is reported by the Bureau of Labor Statistics
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Asked 3/5/2012 9:09:36 PM

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Which statement is true of the y-intercept in the linear regression model?
A. It may be any value.
B. It is always a positive value.
C. The value depends on the slope of the line.
D. It is always zero.
**Weegy:** C. The value depends on the slope of the line. **User:** When the interest rate is positive, what happens to the value of money as we move from the future to the present?
A. Decreases
B. Stays the same
C. Not enough information
D. Increases
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Asked 3/5/2012 9:32:05 PM

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