Picture from Nov 25, 2010

Sarah Hardy, PhD
Associate Professor
Department of Mathematics & Computer Science
University of Maine Farmington

Office: 100 Brinkman
228 Main St, Farmington, ME 04938

Department Phone: 207-778-7120  
Office Phone: 207-778-7124    

Math & CS Department Web Site

University Web Site

Current Vitae


Links for MAT 120 and MAT 220

       Data Analysts Captivated by R's Power

Installing R and Rcmdr (i.e. R Commander) for both MAT 220 and MAT 120

PC Instructions
Mac Instructions

If you run into problems do not uninstall R! Instead, come and see me

For PCs I have a video on Youtube which is outdated now, but close enough to follow it - you can ignore the last part about importing data (after ~4:35).
 Video Tutorial for PCs on YouTube

  Rcmdr Assignment 1 - MAT 220 Due Oct 3 and MAT 120 Due Oct 17
Video instructions for first Rcmdr Assignment
          2015 MPG dataset

Rcmdr Assignment 2 (both MAT 120 and MAT 220 )
Data set - 2014 UMF Student Survey (November update)
Variable key for dataset
Class handout on graphing relationships between two variables
Side-by-side charts in Excel  (in blue 120 book on page 149), also shown in Chi-Square video (starting around the 5 minute mark)

Standard Normal Table
t-table

Power Applet - 20 sec video, link to applet

Practice Tests 3 Fall 02 and Spring 07
Answer keys for Practice Tests 3 Fall 02 and Spring 07


Links for MAT 220 (Data Analysis) Fall 2014
    Proof that the standard deviation is the inflection point of the normal distribution - Iowa State STAT 341 Homework #10 solutions, April 3, 2009 – Problem 7
    Proof that s is an unbiased estimator of the population standard deviation - Penn State STAT 414/STAT415
    Derivation of regression slope and intercept formulas
      Windspeed and N02 corrected graph

      Regression Applets:
        Regression by Eye
        Least Squares Demo
        Rossman/Chance - Regression for two quantitative variables
        Correlation Matching

    Quantile Handout
    CLT Formula Summary
    Video for Quantile Plots in Rcmdr and the Wintering Birds dataset
    (The video comes to pretty abrupt end but that's OK, everything you need is in it.)


Links for MAT 120 (Introduction to Statistics) Fall 2014

Video tutorial on using a calculator

Finding standard deviations
Youtube Videos about finding a SD with a calculator
Online app for calculating standard deviations
R can also be used as a calulator and is one way of finding standard deviations.
To find standard deviations in R at the > type    (Note that this can be done without opening Rcmdr)
> sd(c(72,73,76,76,78))
To find other summary statistics in R at the > type
> summary(c(72,73,76,76,78))

CLT Formulas Summary


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Out-dated Links for MAT 120 (Introduction to Statistics) - Previous semesters

           Two-sample T-test with Rcmdr - Video Tutorial on YouTube

          Chi-Square Tests - Video Tutorial on YouTube

          Regression - Video Tutorial on YouTube

Regression and Correlation Lab Assignment


 

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Links for MAT 367 Spring 2011

Daily Calendar

R & R Commander (Rcmdr) Instructions

Installation Instructions Note: Be sure to answer "Yes" when it asks you if you want to save your workspace at the end of your session.

PC Instructions - Video Tutorial for PCs on YouTube (includes Assignment 1)
Macs Instructions

R plotting characters (pch) and colors

Assignment 1
You will first need to download 2013MPG.xls or 2010MPGcsv.csv (those with Macs may need the .csv version)

Assignment 2 - Numeric Summaries and Basic Graphs - Video Tutorial on YouTube

Two-sample tests for Means ( t-tests and Wilcox test) Video Tutorial

Paired t-test Video Tutorial

Chi-Square Tests - Video Tutorial on YouTube - Fall 2010 Survey Data for Homework - Excel format - .csv format

Regression and Correlation Applets (Do as Homework)

Regression (Video Tutorial) , Confidence Intervals and Prediction Intervals (Video Tutorial and script) and Correlation (Video Tutorial) - Updated HW

Math Scores and Enjoy Math Data - Excel format - .csv format
Moose Collision Data - Excel format - .csv format
Body Fat Data - Excel format - .csv format
State Crime Data - Data Description - Excel format - .csv format

Regression Transformations, Quadratic Regression and Multiple Regression -Starter script - Transformations Video Tutorial Part 1 - Transformations Video Tutorial Part 2 - Quadratic Regression Video

Updated Homework (replaces pages 137-138)

Simulated XY Data - Excel format - xydf.csv
Balloon Data - Excel format - balloons.tex
Dog Dose Data - Data Description - Excel format - dogdose.tex
Loblolly Pine data - Data Description - Excel format - Loblolly.csv
Pond Data - Excel format - pond.tex
Longley Economic Data - Data Description - Excel Format - .csv format

Regression Homework 2 Answers Output

ANOVA - One-way and Two-Way Video Tutorial

Updated Homework (replaces pages 199-200)

Insect Trap Color Data - Excel format - .csv format
Iron Content and Cooking Pot Type - Excel format - .csv format
Rat Pup Swim Maze Data - Data Description - Excel format - .csv format
Warpbreaks Data - Data Desciption - Excel Format - .csv format
Guina Pig Tooth Growth Data - Data Desciption - Excel Format - .csv format

Logistic Regression - Video Tutorial

Logistic Regression R Homework - Shortened version (4/17) - Due Thurs 4/28 - ANSWERS

Coronary Data - Excel format - .csv format
UMF Fall 2010 Student Survey Data - Variable Key - Excel format - .csv format
Low Birth Weight Data - Data Description - Excel format - .csv format
Frog Data - Data Description - Excel format - .csv format

Annotated bibliographies - Helpful websites: Purdue, Cornell and UNC

Review Quiz for Test 1

Multiple Choice Review Questions for Test 2 - Answers to Multiple Choice Review Questions for Test 2


Final Review Sheet

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UMF Schedule Grid