2019年7月18日

range|Sample Standard Deviation|标准差几何意义

摘要： Measures of Variation 方差：measures of variation or measures of spread 源于range发现range不足以评估整个set（因为只用到largest and smallest value），所以有了方差 The Sample Stand 阅读全文

posted @ 2019-07-18 17:37 YUANya 阅读(2687) 评论(0) 推荐(0)

mean|mode|median|sample的表达方式

摘要： Measures of Center measures of central tendency:the center or most typical value:average Mean:its arithmetic average；受极值影响；可以通过去掉极值减少极值的影响 Median:the 阅读全文

posted @ 2019-07-18 16:06 YUANya 阅读(634) 评论(0) 推荐(0)

smooth curve|population|sample

摘要： Distribution Shapes 由直方图到 smooth curve 1.this distribution of heights is bell shaped(or mound shaped), but the smooth curve makes seeing the shape a l 阅读全文

posted @ 2019-07-18 15:13 YUANya 阅读(456) 评论(0) 推荐(0)

摘要： 2.3 Organizing Quantitative Data group quantitative data： To organize quantitative data, we first group the observations into classes (also known as c 阅读全文

posted @ 2019-07-18 14:07 YUANya 阅读(457) 评论(0) 推荐(0)

Relative-Frequency|frequency|pie chart |bar chart

摘要： 2.2Organizing Qualitative Data The number of times a particular distinct value occurs is called its frequency (or count) Relative-Frequency Distributi 阅读全文

posted @ 2019-07-18 12:26 YUANya 阅读(349) 评论(0) 推荐(0)

导航

2019年7月18日