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23 Cards in this Set
- Front
- Back
1. A dot plot is an easy way to represent the relationship between two variables.
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FALSE
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2. A dot plot is useful for quickly graphing frequencies in a small data set.
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TRUE
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3. A dot plot shows the relative symmetry of a distribution.
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TRUE
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4. A dot plot is useful for showing possible outliers.
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TRUE
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5. A dot plot is useful for showing the range of the data.
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TRUE
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6. A stem-and-leaf diagram shows the actual data values.
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TRUE
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7. In a stem-and-leaf display, the leaf represents a class of a frequency distribution.
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FALSE
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8. In a stem-and-leaf display, the leaf represents the members of a class in a frequency distribution.
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TRUE
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9. Quartiles divide a distribution into four equal parts.
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TRUE
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10. Quartiles divide a distribution into ten equal parts.
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FALSE
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11. Percentiles divide a distribution into one hundred equal parts.
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TRUE
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12. A student scored in the 85th percentile on a standardized test. This means that the student scored lower than 85% of all students who took the test.
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FALSE
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13. The 50th percentile of a distribution is the same as the distribution mean.
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FALSE
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14. A box plot graphically shows the 10th and 90th percentiles.
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FALSE
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15. The "box" in a box plot shows the interquartile range.
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TRUE
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16. A box plot shows the relative symmetry of a distribution.
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TRUE
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17. The coefficient of skewness is the standard deviation divided by the mean.
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FALSE
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18. Pearson's coefficient of skewness is a measure of a distribution's symmetry.
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TRUE
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19. If a distribution is negatively skewed, the distribution is not symmetrical and the long tail is to the left.
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TRUE
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20. A scatter diagram of sales versus production is labeled with sales on the Y-axis and production on the X-axis.
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TRUE
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21. A scatter diagram of sales versus production may be constructed by plotting the minimum, first quartile, median, third quartile, and the maximum values of each variable.
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FALSE
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22. A relationship between gender and preference for Coke or Pepsi can be best represented by a scatter diagram.
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FALSE
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23. A relationship between two nominal variables is summarized by a contingency table.
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TRUE
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