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
nonempty set
非空集
26
subset
子集
27
list 和 set 区别?
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
intersection of S and T
∩ 交集
29
union of S and T
∪ 并集
30
disjoint and mutually exclusive
两个集合没有共同元素
31
permutation
排列
32
factorial
阶乘
33
排列 组合的公式是? 0的阶乘?
是1
34
combination
组合
35
independent events
相互独立事件
36
mutually exclusive events
相互排斥 不能同时发生
37
能被3整除
the sum of the digits is divisible by 3
38
能被6整除
the number meets the tests for divisibility by 2 and 3
39
能被9整除
the sum of the digits is divisible by 3
40
integer; whole number
整数
41
正态分布
68.26; 95.44; 99.74