Statistical Methods for Environmental Scientists and Managers
ESPM 3012

Spring 2014
ESPM 3012
Statistical Methods for Environmental Scientists and Managers
Tuesday and Thursday 4:305:45PM, 203 Green Hall
Wednesday 4:056:00PM, 35 Skok Hall/210A Green Hall
Instructor
Dr. Thomas E. Burk
301D Green Hall
PO Box in 115 Green Hall
612624674
Statistical Methods for Environmental Scientists and Managers (MATH)
ESPM 3012

Spring 2014
ESPM 3012
Homework Assignment 1
Due 01/30/2017 11:55pm
The file TroutDensity.csv contains observations on density
of trout in stream reaches of varying bank slopes.
1. Import TroutDensity.csv into Rcmdr.
a. Add a new variable LogTroutDensity to the datase
Statistical Methods for Environmental Scientists and Managers
ESPM 3012

Spring 2014
Getting Started With the R Commander
John Fox and Milan BouchetValat
Version 2.01 (last modied: 8 November 2013)
1
Introduction
The R Commander (Fox, 2005) provides a graphical user interface (GUI) to the opensource R statistical
computing environment
Statistical Methods for Environmental Scientists and Managers
ESPM 3012

Spring 2014
Chapter 1
x=
Mean x
1
xi
n
Standard deviation s
s=
1
2
(x i x )
n 1
Coefficient of variation Cv
Cv =
s
100
x
z=
zscore
x
Chapter 2
s xy =
covariance sxy
(x i x )(y i y )
n 1
r=
correlation (Pearsons product moment) r
s xy
sx sy
Regression truth (or a
Statistical Methods for Environmental Scientists and Managers
ESPM 3012

Spring 2014
Here are examples of knowledge statements that could be tested on Exam 2. The oddnumbered questions in the book (with answers in the back) are a good source of specific
questions (beyond what was on the homework assignments) regarding the general
knowledg
Statistical Methods for Environmental Scientists and Managers
ESPM 3012

Spring 2014
ESPM 3012
Spring 2013
Exam 2
Questions are grouped by book chapter. The option of selecting a question to drop is provided by
chapter. Use only the space below each question to provide your answer (i.e. answers must be short).
Chapter 3 Answer at least 3
Statistical Methods for Environmental Scientists and Managers
ESPM 3012

Spring 2014
ESPM 3012
Spring 2013
Exam 1
You may mark out up to five (5) questions which you dont want to be graded on,
excluding those marked MUST ANSWER.
(4) 1. You are speaking with a relative who does not "know about statistics." Write one
sentence explaining wha
Statistical Methods for Environmental Scientists and Managers
ESPM 3012

Spring 2014
Laboratory Assignment 5 (due 5/1/2014 11:55 pm)
Import the data in file Cuckoo.csv (in the Practice
Data ZIP file for Lab 10) into Rcmdr. Name the
dataset Cuckoo. Cuckoos are known to lay their eggs
in the nests of other (host) birds. The eggs are then,
u
Statistical Methods for Environmental Scientists and Managers
ESPM 3012

Spring 2014
Laboratory Assignment 4 (due 4/17/2014 11:55pm)
Import the data in file ArticRiverDischarge.csv (in the Practice Data ZIP file for Lab 8)
into Rcmdr naming the dataset Flow. The variables are year (ranging from 1936 to 1999)
and water. The variable water
Statistical Methods for Environmental Scientists and Managers
ESPM 3012

Spring 2014
Laboratory Assignment 3 (due 3/6/2014 11:55pm)
Import the data in file NetLife.csv (in Practice Data (ZIP file) for Lab 3 on Moodle) into
Rcmdr. Name it NetLife.
1. Generate 10 (real) random numbers between 1 and 30 using the Uniform distribution
menu sel
Statistical Methods for Environmental Scientists and Managers
ESPM 3012

Spring 2014
Laboratory Assignment 2 (due 2/6/2014 11:55pm)
Import the data in file NetLife.csv (in Practice Data ZIP for Lab 3 on Moodle) into
Rcmdr, naming the data set NetLife. The file contains four columns of numbers, four
variables, and 180 cases. They are the d
Statistical Methods for Environmental Scientists and Managers
ESPM 3012

Spring 2014
ESPM 3012
Homework Assignment 6
Due 04/28/2014
1. We revisit the bear data from question 1. on assignment 2. The data are provided again in
Assign6_1.csv. We will work only with the male bears for this question so first create a data subset
containing dat
Statistical Methods for Environmental Scientists and Managers
ESPM 3012

Spring 2014
ESPM 3012
Homework Assignment 5
Due 4/14/2014
Stratification was used to examine heavy metals
contamination of soil in four areas of Austria (the
population of interest is the four areas in total)
where mining and heavy industry are prevalent. In
this cas
Statistical Methods for Environmental Scientists and Managers
ESPM 3012

Spring 2014
ESPM 3012
Homework Assignment 4  Chapters 6, 7, 8
Due 3/30/2014
1. You are working with a random variable X whose population standard deviation ( ) is
known to be 25. You obtain a random sample from the population and find the sample mean
( x ) to be 40.
Statistical Methods for Environmental Scientists and Managers
ESPM 3012

Spring 2014
ESPM 3012
Assignment 3 Chapters 3, 4, 5 (i.e. covers a lot of material)
Due 03/10/2014 11:55pm
Rain gardens have been proposed as a solution to the
problem of groundwater loss in urban areas. A sunken
garden is planted in an area to capture runoff that
wo
Statistical Methods for Environmental Scientists and Managers
ESPM 3012

Spring 2014
ESPM 3012
Homework Assignment 2
Due 02/16/2014 11:55pm
The file Bears.csv contains data collected on bears in a field study:
chest is chest girth in inches, weight is bear weight in pounds, and sex
is a numerical coding of the animals sex.
1. Interest lie
Statistical Methods for Environmental Scientists and Managers
ESPM 3012

Spring 2014
ESPM 3012
Homework Assignment 1
Due 02/03/2014 11:55pm
The file TroutDensity.csv contains observations on density
of trout in stream reaches of varying bank slopes.
1. Import TroutDensity.csv into Rcmdr.
a. Add a new variable LogTroutDensity to the datase
Statistical Methods for Environmental Scientists and Managers (MATH)
ESPM 3012

Spring 2014
ESPM 3012
Homework Assignment 2
Due 02/12/2017 11:55pm
The file Bears.csv contains data collected on bears in a field study:
chest is chest girth in inches, weight is bear weight in pounds, and sex
is a numerical coding of the animals sex.
1. Interest lie