# STAT 401D (Engineering) Statistical Methods for Research Workers

This website is designed to host course material for STAT 401D (Engineering) - Statistical Methods for Research Workers at Iowa State University.

- Instructor: Jarad Niemi (niemi@iastate.edu, @jaradniemi)
- TA: Yue Zhang (yzhang1@iastate.edu)

This course meets

- MWF 1:10-2 @ Gilman 1810
- T 10-11:50 @ Snedecor 1105

Office hours are

- Instructor: R 3-5 @ Snedecor 1109
- TA: M 9-10, T 1-2, R 1-2 @ Snedecor 2404

## Relevant course pages

## Textbook

There is no required textbook for this course. Here are some free resources that will be used:

- Online Statistics Education
- R for Data Science
- Data Camp
- Introduction to R for Data Science
- Introduction to Linear Regression Analysis (5) by Montgomery, Peck, and Vining
- Steve Vardeman’s Notes

Other resources:

- Coursera Data Science Specialization
- The Statistical Sleuth
- Data Collection and Analysis
- Data Analysis for Scientists and Engineers
- An Introduction to Statistical Learning

## Software

We will be using the Statistical Software R. I will be using RStudio as the interface to R. Although both will be available on lab computers, I suggest you install R and RStudio on your own laptop or desktop (or both).

Install links:

## Course Description

Methods of analyzing and interpreting experimental and survey data. Statistical concepts and models; estimation; hypothesis tests with continuous and discrete data; simple and multiple linear regression and correlation; introduction to analysis of variance and blocking.

## Course Objectives

- Understand the difference between a population and a sample.
- Learn to use statistical methods, e.g. t-tests, rank sum tests, ANOVA, regression, etc., to analyze experimental and observational data.
- Perform, check assumptions, and interpret multiple linear regression.
- Write, interpret, and critically evaluate statements such as
- No significant differences were observed between A/H5N1_HA N182K- and A/H5N1_HA Q222L,G2245-inoculated animals, as calculated by comparing the viral titer (Mann-Whitney test, P=0.589 and 0.818 for nose and throat titers, respectively).
- … estimate gross carbon emissions across tropical regions between 2000 and 2005 as 0.81 petagram of carbon per year, with a 90% prediction interval of 0.57 to 1.22 petagrams of carbon per year.

## Prerequisite

The prerequisite for the course is previous enrollment in one of the following statistics (STAT) courses: 101, 104, 105, 201, or 226.

## Q&A

Please use the Blackboard discussion forum.

## Schedule

Week | Topic | Reading |
---|---|---|

1 | Data | |

2 | Probability | |

3 | Distributions | |

4 | Modeling | |

5 | Inference | |

6 | ||

7 | Regression | |

8 | ||

9 | midterm | |

spring break | ||

10 | Simple linear regression | |

11 | Multiple regression | |

12 | ANOVA | |

13 | Contrasts | |

14 | Model selection | |

15 | Poisson and logistic regression | |

final exam |

## Faculty Senate Recommendations

This course abides by the Faculty Senate Recommendations provided at http://www.celt.iastate.edu/teaching/preparing-to-teach/recommended-iowa-state-university-syllabus-statements.