Publications by Shiju Zhang
Publish Document
Chapter 1. Introduction Nonparametric statistics is a pretty old (> 120 years) branch of statistics. Its basic theory is very mature. Nonparametric methods are mainly developed for the use with small samples. For large samples, the methods are equally good as parametric methods based on normality. Compared to parametric tests, nonparametric tests...
75828 sym R (53063 sym/236 pcs) 32 img 21 tbl
Document
library(tidyverse) library(openintro) Exercise 1 arbuthnot$girls ## [1] 4683 4457 4102 4590 4839 4820 4928 4605 4457 4952 4784 5332 5200 4910 4617 ## [16] 3997 3919 3395 3536 3181 2746 2722 2840 2908 2959 3179 3349 3382 3289 3013 ## [31] 2781 3247 4107 4803 4881 5681 4858 4319 5322 5560 5829 5719 6061 6120 5822 ## [46] 5738 5717 5847 6203 6033 ...
1403 sym
Publish Document
Instructions Each question is worth 10 points, and should be done using R. Submit your report along with code to D2L dropbox “Final Exam” under “Quizzes”. Question #1 Refer to the “shoes” data from the package “MASS”. Note that this package has been installed, so you only need to load it when using it. The data show the amounts ...
2784 sym 1 img
Document
Chapter 0: What Is Statistics? “Statistics is the grammar of science.” - Karl Pearson Science depends upon statistical analysis. Write a Statistical Report “Whenever I read statistical reports, I try to imagine my unfortunate contemporary, the Average Person, who, according to these reports, has 0.66 children, 0.032 cars, and 0.046 TVs.”...
113684 sym 28 img 5 tbl
Document
$$\sqrt{2} = 1.4142135623 7309504880 1688724209 6980785696 7187537694 8073176679 7379907324 7846210703 8850387534 3276415727 ...$$ $$\pi = 3 . 1 4 1 5 9 2 6 5 3 5 8 9 7 9 3 2 3 8 4 6 2 6 4 3 3 8 3 2 7 9 5 0 2 8 8 4 1 9 7 1 6 9 3 9 9 3 7 5 1 0 5 8 2 0 9 7 4 9 4 4 5 9 2 3 0 7 8 1 6 4 0 6 2 8 6 2 0 8 9 9 8 6 2 8 0 3 4 8 2 5 3 4 2 1 1 7 0 6 7 9 ...$$ ...
350 sym 1 img
Publish Document
1 The “tidyverse” Package It is a super package. Loading this package also loads “dplyr” and “ggplot2” packages. The “dplyr” package is for data wrangling. It provides a consistent set of verbs that help you solve the most common data manipulation challenges: mutate() adds new variables that are functions of existing variables. s...
5172 sym Python (16727 sym/28 pcs) 40 img
Publish Document
A Statement for STAT 103 (Statistical Thinking) This course meets the Liberal Education Goal Area 4 requirement. Other courses which meet this requirement include STAT 103, 219, and 239 and MATH 106, 112, 113, 115, 201, 211, 221 and 222. MATH 103 is an appropriate class for many majors. However, students majoring in business, elementary education...
5932 sym 1 tbl
Document
PART I: EXPLORING AND COLLECTING DATA 1. Data and Decisions Data are recorded values, whether numbers or labels, together with their context. Data help companies make good decisions on answering business questions. Data are recorded and stored electronically, in vast digital repositories called data warehouses. Data can be structured or unstruc...
8489 sym R (5449 sym/14 pcs) 4 img 1 tbl
Document
PART I: EXPLORING AND COLLECTING DATA 1. Data and Decisions Data are recorded values, whether numbers or labels, together with their context. Data help companies make good decisions on answering business questions. Data are recorded and stored electronically, in vast digital repositories called data warehouses. Data can be structured or unstruc...
85662 sym R (12451 sym/44 pcs) 17 img 10 tbl
Publish Document
PART I: EXPLORING AND COLLECTING DATA 1. Data and Decisions Data are recorded values, whether numbers or labels, together with their context. Data help companies make good decisions on answering business questions. Data are recorded and stored electronically, in vast digital repositories called data warehouses. Data can be structured or unstruc...
8489 sym R (5449 sym/14 pcs) 4 img 1 tbl