Statistics 106
Homework 1
Due : Jan. 13, 2016, In Class
15.1
In an experiment to study the eect of the location of a product display in drugstores of a chain, the
manager of one of the drugstores rearranged the displays of other products so as to increase
Statistics 106
Homework 4 Solution
NOT Due
17.1
A student, asked to give a class demonstration of the use of a condence interval for comparing two
treatment means, proposed to construct a 99 percent condence interval for the pairwise comparison
D = 5 3 ,
A. Farris
STA 106
Final Exam Practice
Summer 2015
Name:
Answer ALL of the following questions. Explain your answers succinctly for full credit.
1. (15 points) Use the ANOVA table below to address the following problems.
Analysis of Variance Table
Response
Statistics 106
Winter 2013
Homework 1
Due date : January 18 (Friday)
1. Problem 15.1 : In an experiment to study the eect of the location of a product
display in drugstores of a chain, the manager of one of the drugstores rearranged the
displays of other
SSTO = SSE + SSTR
=
df(SSTO) = df(SSE) + df(SSTR) (nT 1) = (nT r) + (r 1)
Type I error: reject the null hypothesis when it is true
Type II error: accept the null hypothesis when it is wrong
Powr: probability of rejecting null hypothesis when it is wrong
P
Statistics 106
Fall 2013
Homework 1
Due date : October 9 (Wednesday)
1. Problem 15.1 : In an experiment to study the eect of the location of a product
display in drugstores of a chain, the manager of one of the drugstores rearranged the
displays of other
STA 106
Solution to Homework 5
Problem 19.5
.j = .j . = 0 (j = 1, 2, 3, 4). This implies that factor B
(a) .j = 269 (j = 1, 2, 3, 4),
seems to have no eect.
(b) The treatment means plots are shown below. If the curves are not parallel, then interaction
29
STA 106:
Applied Statistics:
Analysis of Variance
Lecture 1
Irina Udaltsova
Department of Statistics
University of California, Davis
March 30th, 2015
Welcome!
What?
STA 106: Analysis of Variance (Topics in Applied Statistics)
Where?
Max Kleiber Hall 3
Whe
Statistics 106
Fall 2013
Solution : Sample Final Exam
Print name:
Print ID (last four digits):
Sign name:
Instructions: This is a closed book exam. Two pages of notes are allowed (double sided,
handwritten). The total score is 100. You must show your work
Statistics 106
Spring 2016
Homework 1
Due date : April 8 (Friday)
1. Problem 15.1 : In an experiment to study the eect of the location of a product
display in drugstores of a chain, the manager of one of the drugstores rearranged the
displays of other pro
Homework 4 Solutions
STA 106, Spring 2015
For all questions you must show your working. This enables us to understand your
thought process, give partial credit and prevent crude cheating. Please see the code
of the conduct on Smartsite for rules about col
Homework 5 Solutions
STA 106, Winter 2015
For all questions you must show your working. This enables us to understand your
thought process, give partial credit and prevent crude cheating. Please see the code
of the conduct on Smartsite for rules about col
Homework 4 Solutions
STA 106, Winter 2015
For all questions you must show your working. This enables us to understand your
thought process, give partial credit and prevent crude cheating. Please see the code
of the conduct on Smartsite for rules about col
STA 106: Homework 2
Due: 3:10pm, Wed 15th April
Assigned: Friday, 8th April
For all questions you must show your work. This enables us to understand your
thought process, give partial credit and prevent crude cheating. Please see the code of
the conduct i
Homework 3 Solutions
STA 106, Winter 2015
For all questions you must show your working. This enables us to understand your
thought process, give partial credit and prevent crude cheating. Please see the code
of the conduct on Smartsite for rules about col
Homework 1 Solutions
STA 106, Winter 2015
For all questions you must show your working. This enables us to understand your
thought process, give partial credit and prevent crude cheating. Please see the code
of the conduct on Smartsite for rules about col
STA 106: Homework 4
Due: 3:10pm, Wed 6th May
Assigned: Tuesday, 28th April
For all questions you must show your work. This enables us to understand your
thought process, give partial credit and prevent crude cheating. Please see the code
of the conduct in
Statistics 106
Winter 2013
Solution : Sample Final Exam
Print name:
Print ID (last four digits):
Sign name:
Instructions: This is a closed book exam. Two pages of notes are allowed (double sided,
handwritten). The total score is 100. You must show your wo
Statistics 106
Winter 2013
Homework 8
NOT DUE
1. Problem 25.9 : Coil winding machines. A plant contains a large number of
coil winding machines. A production analyst studied a certain characteristic of the
wound coils produced by these machines by selecti
Statistics 106
Winter 2013
Homework 4
Due date : February 22 (Friday)
1. Problem 18.6 : Refer to the Rehabilitation therapy problem 16.9.
(a) Obtain the residuals and prepare aligned residual dot plots by factor level.
What departures from ANOVA model (16
Homework 2 Solutions
STA 106, Winter 2015
For all questions you must show your working. This enables us to understand your
thought process, give partial credit and prevent crude cheating. Please see the code
of the conduct on Smartsite for rules about col
STA 106
Solution : HW 7
1
Problem 21.7
(a) The researcher wants to study the eect of three experimental diets with varying fat contents
on the total lipid level in plasma which has a correlation with the persons age. Thats why
the researcher divided his s
Statistics 106
Winter 2013
Homework 3
Due date : February 6, 2013 (Wednesday)
1. Consider a single factor model with r = 4 factor levels, and suppose that the standard
assumptions hold. What should be the minimum sample size for each treatment group
under
Statistics 106
Fall 2014
Homework #1
Due Monday, October 20, 2014
Problem 1: P15.4 page 672 Three treatments (T1 , T2 , T3 ) are to be studied in an experiment with a
completely randomized design using 5 replicates. Obtain the randomized assignment of tre
Statistics 106
Winter 2013
Homework 2
Due date : January 28 (Monday)
1. Problem 16.4 : A company, studying the relation between job satisfaction and length
of service of employees, classied employees into three length-of-service groups (less
than 5 years,
STA 106: Homework 1
Due: 3:10pm, Wed 8th April
Assigned: Wednesday, 1st April
For all questions you must show your work. This enables us to understand your
thought process, give partial credit and prevent crude cheating. Please see the code
of the conduct
Homework 5 Solutions
STA 106, Spring 2015
For all questions you must show your working. This enables us to understand your
thought process, give partial credit and prevent crude cheating. Please see the code
of the conduct on Smartsite for rules about col
STA 106: Homework 6
Due: 3:10pm, Wed 20th May
Assigned: Wednesday, 13th May
For all questions you must show your work. This enables us to understand your
thought process, give partial credit and prevent crude cheating. Please see the code
of the conduct i
STA106 Discussion3
Angela Liu
March 14, 2015
1
Degress of Freedom
In statistics, the number of degrees of freedom is the number of values in the final calculation
of a statistic that are free to vary. Think of degrees of freedom as a mathematical restrict
STA106 Discussion9
Angela Liu
May 26, 2015
1
Two-factor ANOVA model without replication(n=1)
Assume there is no interaction between factor A and factor B.
1.1
Test factor A main effects:
hypothesis H0 : 1 = 2 = = a = 0 vs Ha : not all i s are equal.
b P
STA106 Discussion2
Angela Liu
March 7, 2015
1
Experimental vs. Observational Studies
In an experimental study investigators apply treatments to experimental units (people, animals, plots of land, etc.) and then proceed to observe the effect of the treatm
STA106 Discussion4
Angela Liu
April 21, 2015
1
Power Analysis
Test H0 : 1 = 2 = = r under a single factor ANOVA model:
Power depends on the noncentrality parameter:
r Pr
2
1
i=1 ni (i .)
=
r
When the alternative hypothesis Ha is true, the test statistic
STA106 Discussion5
Angela Liu
April 28, 2015
1
Problem 18.7 Cash offers Example
A consumer organization studied the effect of age of automobile owner on size of cash offer
for a used car by utilizing 12 persons in each of three age groups(young, middle, e