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数学 > 数据分析 data analysis > Flashcards

数据分析 data analysis Flashcards

1
Q

variable [‘veərɪəb(ə)l]

A

变量

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2
Q

count

A

数目 就是 frequency

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3
Q

relative frequency

A

相对频率 一般指相对整体 就是一般意义上的频率 用分数或者百分数 小数表示

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4
Q

bar graph; bar chart

A

柱状图

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5
Q

circle graph; pie chart

A

饼状图

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6
Q

sector

A

饼状图里的每一小部分

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7
Q

histogram

A

直方图

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8
Q

scatter plot

A

散点图

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9
Q

time plot

A

时间曲线图

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10
Q

arithmetic mean

A

平均数

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11
Q

median

A

中数

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12
Q

mode

A

众数

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13
Q

weighed mean

A

加权平均数

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14
Q

measure of position

A

位置的度量

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15
Q

quartiles

A

四分位数 Q2=中数 Q1=较小的一组的中数 Q3=较大的一组的中数

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16
Q

percentiles

A

百分位数

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17
Q

measures of dispersion

A

离散型的度量

18
Q

range

A

值域：最大值减最小值

19
Q

interquartile range

A

四分位差Q3减去Q1

20
Q

boxplot 或者 box and whisker plot

A

箱线图 上面有五个书：最小值 Q1 Q2 Q3 最大值

21
Q

standard deviation=population standard deviation

A

总体标准差 就是那种正常的算法

22
Q

sample standard deviation

A

样本标准差 当数值为随机抽取样本时 底下为n-1

23
Q

standardization

A

标准化 就是用变量减去算数平均值再除以标准差：可以算出 how many standard deviations above or below the mean.

24
Q

empty set

A

空集 空集是所有集合的子集

25
Q

nonempty set

A

非空集

26
Q

subset

A

子集

27
Q

list 和 set 区别？

A

序列 有限的集合 并且可能重复 有顺序；集合里面的数字不能重复，并且没顺序

28
Q

intersection of S and T

A

∩ 交集

29
Q

union of S and T

A

∪ 并集

30
Q

disjoint and mutually exclusive

A

两个集合没有共同元素

31
Q

permutation

A

排列

32
Q

factorial

A

阶乘

33
Q

排列 组合的公式是？ 0的阶乘？

A

是1

34
Q

combination

A

组合

35
Q

independent events

A

相互独立事件

36
Q

mutually exclusive events

A

相互排斥 不能同时发生

37
Q

能被3整除

A

the sum of the digits is divisible by 3

38
Q

能被6整除

A

the number meets the tests for divisibility by 2 and 3

39
Q

能被9整除

A

the sum of the digits is divisible by 3

40
Q

integer; whole number

A

整数

41
Q

正态分布

A

68.26； 95.44； 99.74

数学 (5 decks)

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