单选题
*Based on households with discretionary income．
| HOUSEHOLD DISCRETIONARY INCOME BY HEAD OF HOUSEHOLDS AGE-GROUP | ||||
| Head of Household’s Age-Group(in years) | Number of Households (in thousands)with Discretionary Income | Percent of Households with discretionary Income | Average* Household | Average* Discretionary Income per Household |
| 15 to 24 25 to 29 30 to 34 35 to 39 40 to 44 45 to 49 50 to 54 55 to 59 60 to 64 65 to 69 70 and older | 972 2，646 3，41 9 3，31 9 2，605 2，299 2，008 2，252 1，848 1，523 2，946 | 18.7% 27.4 31.5 33.0 30.5 33.4 31.8 35.0 28.8 25.0 22.8 | $30，124 36，618 40，067 43，585 47，891 49，968 49,079 44，906 44，262 38，968 32，344 | $7，790 9.130 10.919 12.405 13.999 14.448 13.550 14. 584 14.356 12.921 11.015 |
| All age Groups | 25，869 | 28.9% | $4l，940 | $12，332 |
单选题
For which age—group was the percent of households with discretionary income most nearly equal to 
?
A. 15 to 24 B. 25 to 29
C. 40 to 44 D. 60 to 64
E. 70 and older
?A. 15 to 24 B. 25 to 29
C. 40 to 44 D. 60 to 64
E. 70 and older
【正确答案】
E
【答案解析】标题：冢王位于不同年龄组的冢庭的臼由收入哪一年龄组拥有自由收入的家庭的比例最接近[*]?
表中第三列是拥有自由收入的家庭所占的百分比，因为[*]≈22.2%，所以很显然70岁以上年龄组的家庭最接近于[*]。
表中第三列是拥有自由收入的家庭所占的百分比，因为[*]≈22.2%，所以很显然70岁以上年龄组的家庭最接近于[*]。
单选题
Which of the following statements can be inferred from the data?
Ⅰ Each household in the age—group 15 to24 had at least $7，500 in discretionary income．
Ⅱ Of the age groups listed，the age—group55 to 59 had the greatest percent of households with discretionary income．
Ⅲ For the age—group 50 to 54，average discretionary income per household was less than one—fourth of the average household income．
A. Ⅱ only
B. Ⅲ only
C. Ⅰ and Ⅱ only
D. Ⅱ and Ⅲ only
E. Ⅰ，Ⅱ，and Ⅲ
Ⅰ Each household in the age—group 15 to24 had at least $7，500 in discretionary income．
Ⅱ Of the age groups listed，the age—group55 to 59 had the greatest percent of households with discretionary income．
Ⅲ For the age—group 50 to 54，average discretionary income per household was less than one—fourth of the average household income．
A. Ⅱ only
B. Ⅲ only
C. Ⅰ and Ⅱ only
D. Ⅱ and Ⅲ only
E. Ⅰ，Ⅱ，and Ⅲ
【正确答案】
A
【答案解析】从表中数据能推出下列哪项陈述?
Ⅰ每一个位于15至24岁年龄组的家庭至少都有$7，500的自由收入。
Ⅱ 在列出的年龄组中，55至59岁年龄组有自由收入的家庭比例最大。
Ⅲ 对50至54岁年龄组，每户平均的自由收入少于每户平均收入的1/4。
由表中的数据可知，15至24年龄组的家庭平均自由收入为$7，790，但这不能表明任一家庭的平均自由收入都超过$7，790；对于Ⅱ，从表中可以查到比例35%是最高的，这一值对应于55至59岁年龄组；而对于50至54年龄组．每户平均收入为$49，079，平均自由收入为$13，550，大于每人收入的[*]，因此Ⅲ不正确。
Ⅰ每一个位于15至24岁年龄组的家庭至少都有$7，500的自由收入。
Ⅱ 在列出的年龄组中，55至59岁年龄组有自由收入的家庭比例最大。
Ⅲ 对50至54岁年龄组，每户平均的自由收入少于每户平均收入的1/4。
由表中的数据可知，15至24年龄组的家庭平均自由收入为$7，790，但这不能表明任一家庭的平均自由收入都超过$7，790；对于Ⅱ，从表中可以查到比例35%是最高的，这一值对应于55至59岁年龄组；而对于50至54年龄组．每户平均收入为$49，079，平均自由收入为$13，550，大于每人收入的[*]，因此Ⅲ不正确。