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云南行测备考 || 资料分析中的“指数”

  • 2026-11-10 03:07:08
云南行测备考 || 资料分析中的“指数”

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前程似锦~未来可期

2027年

省考行测篇

备战省考

行测篇

行测资料分析主要是围绕增长、比重、倍数和平均数这些核心考点考查大家,实际上考试中除了这些核心知识点之外,还会考查一些不常见的考点,例如指数。很多同学可能并不是很了解这一考点,接下来华小编带大家来学习指数的相关考点。

一、指数的含义

把基期值当成100,现期值对应的数叫做指数。

二、指数的计算公式:

例题

2020年学校学生人数为500人,2019年学生人数为200人,则2020年学生人数指数为:

三、指数的相关考点

1.利用指数判断现期值与基期值的大小

指数>100,现期值>基期值;

指数<100,现期值<基期值;

指数=100,现期值=基期值。

例题

2020年中国居民消费文化娱乐用品价格指数为99.7,2009年指数为99.8。问:2020年中国居民消费文化娱乐用品价格比2019年低。(判断正误)

【答案】正确。解析:2020年的价格指数是将2019年的价格看作100,此时2020年的价格为99.7,因此比较2020年与2019年的居民消费价格只需要比较指数99.7与100的大小即可。因为指数99.7<100,所以现期值<基期值,2020年居民消费价格比2019年低。

2.利用指数求倍数

例1

2020年6月份新建住宅价格同比指数为118.4,环比指数为100.1。问:2020年6月份新建住宅价格是2019年6月份的几倍?

【答案】1.184倍。解析:2020年6月新建住宅价格同比指数是将基期2019年6月份的价格看作100,此时2020年6月份的价格为指数118.4。2020年6月是2019年6月的几倍可列式为:

3.利用指数求增长率

增长率=(指数-100)%

例2

2021年居民消费价格指数为105.4,2020年指数为103.3。问:2021年居民消费价格同比增长百分之几?

【答案】2021年居民消费价格指数是将2020年价格看作100,此时2021年的价格为105.4,因此求2021年居民消费价格指数的同比增长率可列式为因此已知指数求增长率可直接列式增长率=(指数-100)%。

例3

问:2017年-2021年,北京地区生产总值同比增速最快的是哪年?增速是多少?

【答案】2017年,14.5%。解析:由增长率=(指数-100)%可知2017年-2021年的增速分别为14.5%,9.1%,10.2%,10.3%,8.1%,所以增速最快的是2017年,为14.5%。

通过上面几道题目的练习,相信同学们对于指数有了一定的掌握,利用指数我们可以比较现期值基期值的大小,也可以求倍数或增长率。今后在做题过程中,也要多加练习才能让自己更加熟练的掌握这类题型。

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