数据分析 data analysis

Question 1

variable [‘veərɪəb(ə)l]

Answer 1

变量

Question 2

count

Answer 2

数目 就是 frequency

Question 3

relative frequency

Answer 3

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

Question 4

bar graph; bar chart

Answer 4

柱状图

Question 5

circle graph; pie chart

Answer 5

饼状图

Question 6

sector

Answer 6

饼状图里的每一小部分

Question 7

histogram

Answer 7

直方图

Question 8

scatter plot

Answer 8

散点图

Question 9

time plot

Answer 9

时间曲线图

Question 10

arithmetic mean

Answer 10

平均数

Question 11

median

Answer 11

中数

Question 12

mode

Answer 12

众数

Question 13

weighed mean

Answer 13

加权平均数

Question 14

measure of position

Answer 14

位置的度量

Question 15

quartiles

Answer 15

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

Question 16

percentiles

Answer 16

百分位数

Question 17

measures of dispersion

Answer 17

离散型的度量

Question 18

range

Answer 18

值域：最大值减最小值

Question 19

interquartile range

Answer 19

四分位差Q3减去Q1

Question 20

boxplot 或者 box and whisker plot

Answer 20

箱线图 上面有五个书：最小值 Q1 Q2 Q3 最大值

Question 21

standard deviation=population standard deviation

Answer 21

总体标准差 就是那种正常的算法

Question 22

sample standard deviation

Answer 22

样本标准差 当数值为随机抽取样本时 底下为n-1

Question 23

standardization

Answer 23

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.

Question 24

empty set

Answer 24

空集 空集是所有集合的子集

Question 25

nonempty set

Answer 25

非空集

Question 26

subset

Answer 26

子集

Question 27

list 和 set 区别？

Answer 27

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

Question 28

intersection of S and T

Answer 28

∩ 交集

Question 29

union of S and T

Answer 29

∪ 并集

Question 30

disjoint and mutually exclusive

Answer 30

两个集合没有共同元素

Question 31

permutation

Answer 31

排列

Question 32

factorial

Answer 32

阶乘

Question 33

排列 组合的公式是？ 0的阶乘？

Answer 33

是1

Question 34

combination

Answer 34

组合

Question 35

independent events

Answer 35

相互独立事件

Question 36

mutually exclusive events

Answer 36

相互排斥 不能同时发生

Question 37

能被3整除

Answer 37

the sum of the digits is divisible by 3

Question 38

能被6整除

Answer 38

the number meets the tests for divisibility by 2 and 3

Question 39

能被9整除

Answer 39

the sum of the digits is divisible by 3

Question 40

integer; whole number

Answer 40

整数

Question 41

正态分布

Answer 41

68.26； 95.44； 99.74