STAT 4220 HW1 (30 points) Due on Thu, Feb 3 1. Consider an old economic dataset on 50 different countries. This dataset is within the faraway library. These data are averages over 1960-1970 (to remove business cycle or other short-term fluctuations). dpi
STAT 4220
HW1 (30 points)
1. Consider an old economic dataset on 50 dierent countries. This dataset is within
the faraway library. These data are averages over 19601970 (to remove business
cycle or other short-term uctuations). dpi is per-capita disposabl
STAT 4220
HW1 (30 points)
Due on Thu, January 28
1. Consider an old economic dataset on 50 dierent countries. This dataset is within
the faraway library. These data are averages over 19601970 (to remove business
cycle or other short-term uctuations). dpi
STAT 4220
HW7 (20 points)
Due on Thu, April 1
1. To compare the eects of ve dierent assembly methods (denoted by the
Latin letters A, B , C , D, and E ) on the throughput, an experiment based
on a Graeco-Latin square was conducted which involved three blo
STAT 4220
HW8 (30 points)
Due on Thu, April 8
1. (12 points) Box and Bisgaard (1987) described an experiment to reduce
the percentage of cracked springs produced by a particular manufacturing
process. Three factors are investigated: temperature of the que
STAT 4220
HW5 (45 points)
Due on Tue, March 16
1. Look at the problem 1 of HW3. This is the CRD we discussed for estimating
how the diets aect the coagulation rates of rabbits. The data are given
on the K: drive.
(a) (4 points) Use R to do the multiple co
STAT 4220
HW5 (45 points)
1. Look at the problem 1 of HW3. This is the CRD we discussed for estimating how the
diets aect the coagulation rates of rabbits. The data are given on the K: drive.
(a) (4 points) Use R to do the multiple comparisons at level =
Fun R Problem
1. (20 points) See http:/www.doverpublications.com/mathsci/0618/270785.pdf.
Purrer has decided to take a nap. He dreams he is encircled by 13 mice: 12 gray
and 1 white. He hears his owner saying: Purrer, you are to eat each thirteenth
mouse,
STAT4220
First Midterm Examination February 18, 2010
(Total : 20 points)
Name :
Student ID#
Problem 1 2 3 Total
Max pts 3 12 5 20
Score
Show all steps to receive full credit.
1. Fundamental principles
(a) What is the difference between replication and rep
STAT4220
Second Midterm Examination March 23, 2010
(Total : 20 points)
Name :
Student ID#
Problem 1 2 3 Total
Max pts 8 10 2 20
Score
1. (8 points) Consider the Reectance data in pulp experiment (as discussed in class). Each of
four operators made ve pulp
STAT4220
Second Midterm Examination March 23, 2010
(Total : 20 points)
Student ID#
Name :
1. (8 points) R Problem. Consider the Bolt Experiment discussed in Unit 5. There are two
factors - type (C&W, HT and P&O) and medium (bolt or mandrel). The data are
STAT4220
Third Midterm Examination May 4, 2010
(Total : 30 points)
Name :
Student ID#
Problem 1 2 Total
Max pts 20 10 30
Score
Show all steps to receive full credit.
1. (20 points) A management information systems consultant conducted a small-scale study
R Notes CRD
How to read different data files?
Change the directory. Type getwd() to make sure that you are in the right directory.
Open the data file in notepad - make sure you know what is there.
Does the data file have variable names? Yes or No?
Use the
STAT 4220
HW7 (20 points)
1. To compare the eects of ve dierent assembly methods (denoted by the
Latin letters A, B, C, D, and E) on the throughput, an experiment based
on a Graeco-Latin square was conducted which involved three blocking
variables: day, o
STAT4220 Extra Credit HW Problem 1
(20 points) Consider the function
cfw_
() =
4 sin( 1 )+2
1+|3
0
when = 0
when = 0
We would like to plot the function for the range 10 6. Write a R code to
evaluate the function for the points
= [10.0, 9.9, 9.8, . . . ,
STAT 4220
HW3 (20 points)
1. Consider the CRD we discussed for estimating how the diets aect the
coagulation rates of rabbits. The data are given on the K: drive.
(a) (4 point) Use R to analyze the data as a completely randomized design.
Write down the AN
STAT 4220
HW4 (35 points)
1. Consider the practice exam problem involving the analysis of some data on
length of cuckoo eggs. A study by E.B. Chance in 1940 called The Truth
About the Cuckoo demonstrated that cuckoos return year after year to
the same ter
STAT 4220
HW8 (30 points)
1. (12 points) Box and Bisgaard (1987) described an experiment to reduce
the percentage of cracked springs produced by a particular manufacturing
process. Three factors are investigated: temperature of the quenching oil,
carbon c
STAT 4220
HW2 (20 points)
1. Consider the same Galapagos data you analyzed in Unit 1. Now read it from the
data le named data2.1.txt in the 4220 folder of K: drive. You can use the
following commands.
> data1 = read.table("data2.1.txt")
> data1 = data.fra
STAT4220
Extra Credit HW Problem 2
1. (20 points) Write a function f such that
(a) The input is a character string, such as American Idol 2013 or The New
York Times.
(b) The function should be able to nd the length of the string (including
spaces) called
STAT 4220
HW6 (15 points)
1. (5 points) Fill up the gaps in the following Latin Square Design of order 9.
A
H
D
F
B
C
B
*
G
C
E
*
*
*
F
C
F
E
*
*
A
*
D
*
*
G
B
*
H
C
*
E
*
E
C
H
*
I
*
D
F
G
*
I
*
E
D
*
C
*
*
G
E
C
B
*
*
A
I
D
*
*
F
I
A
D
E
*
*
*
A
D
G
*
E
STAT4220
Third Midterm Examination May 4, 2010
(Total : 30 points)
Name :
Student ID#
Show all steps to receive full credit.
1. (30 points) An experiment on a surface-nishing operation of an overhead cam block auxiliary drive shaft was reported by Sirvanc
STAT4220
Second Midterm Examination March 23, 2010
(Total : 20 points)
Name :
Student ID#
Problem 1 2 3 Total
Max pts 6 11 3 20
Score
1. (6 points) The data in Table 1 show the measurements of security reaction time (in 10ths of a
second) between a securi