TRUE OR FALSE
1. True or false: Histograms are superior to stem-and-leaf displays because histograms retain the information contained in the data set.
2. True or false: A histogram always provides a realistic summary of the symmetry or skewness of a data set.
FILL IN THE BLANK
3. The frequencies in a frequency distribution must add up to the _____ _____ [two words].
4. A _____ _____ [two words] for a qualitative variable is a listing of all values that the variable can take, together with the frequencies for each value.
SHORT ANSWER
5. If there is a line that splits an image in half, so that one side is the mirror image of the other, we say that the image is what?
6. If the right tail of a distribution is longer than the left tail, we say that the distribution is what?
CALCULATIONS AND INTERPRETATIONS
Life Expectancy. For Exercises 7–15, refer to the following table, which shows the life expectancy at birth in 2010, as reported by the World Health Organization.10
| Country | Life expectancy |
|---|---|
| Afghanistan | 42 |
| Canada | 81 |
| China | 74 |
| Ghana | 62 |
| India | 64 |
| Israel | 81 |
| Mexico | 76 |
| Russia | 68 |
| United Kingdom | 80 |
| United States | 78 |
Construct the following:
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7. Frequency distribution
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8. Relative frequency distribution
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9. Cumulative frequency distribution
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10. Cumulative relative frequency distribution
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11. Frequency bar graph
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12. Relative frequency bar graph
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13. Pie chart of the relative frequencies
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14. Ogive of the frequencies
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15. Relative frequency ogive of the frequencies