HOMEWORK 6 STAT 3360 FALL 2013 ANSWERS
DUE BY OCTOBER 17, 2013
THROUGHOUT THIS ASSIGNMENT WE ARE DEALING WITH VARIOUS SAMPLES DRAWN
FROM THE POPULATION OF PERSONNEL SALARIES. INDIVIDUAL SALARIES ARE ASSUMED
TO BE NORMALLY DISTRIBUTED, WITH THE POPULATION
ANSWERS HOMEWORK 7 STAT 3360 FALL 2013
DUE BY OCTOBER 22
INFERENCES ABOUT THE POPULATION MEAN
1.
(A)
(B)
2.
A SAMPLE OF 25 FAMILIES WAS DRAWN FOR ANALYSIS OF THE AVERAGE GROCERY
SPENDING. ASSUME THAT THE INDIVIDUAL WEEKLY EXPENCES ARE NORMALLY
DISTRIBUTED
STAT 3360 FALL 2013
SEPTEMBER 26, 2013
QUIZ 4-ANSWERS
TYPE YOUR NAME, PLEASE!
FIRST NAME
LAST NAME
SECTION
003
NANCY WORKS AS FINANCIAL ANALYST. SHE NEEDS TO PROJECT RETURN ON
INVESTMENT (ROI) MEASURED IN CENTS PER MONTH PER INVESTED DOLLAR.
THEREFORE, NA
1. New United Motor Manufacturing (NUMMI), a joint venture of General Motors and Toyota
located in California, assembles two types of cars (Corollas and Prisms). Separate assembly lines
are used for each type of car. Classify each of the following cost it
ACCT 6335- Ethics for Professional Accountants
Course Information
Course Number/Section
Course Title
Term
ACCT 6335
Accounting for Professional Accountants
Spring 2017 (first 8-weeks)
Professor Contact Information
Professor
Amy Troutman, CPA
Office Phone
Online/Blended Course Syllabus
ACCT 6331.0W1 Cost Accounting
Spring 2016
Course Information
Course Number Section
Course Title
Term and Dates
ACCT 6331.0W1
Cost Accounting
Spring 2016 (01/11 05/07)
Professor Contact Information
Professor
Office Phone
Emai
Course
Professor
Term
Class Sessions
STAT 3332.002 Statistics for Life Sciences
Swati Biswas
Fall 2014
MW 11:30 am - 12:45 pm, GR 3.420
Professors Contact Information
Office Phone
Office Location
Email Address
Course Website
Office Hours
Preferred Method
Sign Test
I
I
I
I
I
I
I
So far we have worked with hypothesis tests about population mean(s).
If the probability histogram from which sampling is done is skewed
(e.g., incomes) what is an appropriate measure of center?
However, CLT ensures that even if th
Exa mp l e
Phyllis had 6 HW grades in her statistics cla s: 8688 92
> Her mean gradejs: <86 *W'l‘ll M-rc‘m $1Qy5‘;
7K : (“é ‘ i
> Her median rade is: 6 8% $0} OlO Ol'Z—a
g . 3 W5. 8’? t Kol - 8‘8 '9.
. v~ lea; ’ W ’
Issue: Which one to use. 2/ ’
Does
com“ ed Experimentannmg
R
lo
M“
,J
> Q: Once we randomly assign subjects to groups, should we
@Tell them which group they are in / jlvfﬂvfb/lc MM
(AC9 l\lot tell them‘
3. ' coi {Cl/4f
> We want to eliminate subject bias —— subjects knowingly or
unknowin
L‘*lnj "
v Ex: Recall the Titanic tragedy: 1490 out of 2201 occupants i
had died. gmhwk
3» Here is a count of survivors and victims in each gender waon
amongst the 3rd class passengers and the crew (lst and 2nd
class passengers fared much better but are n
HowChange of Scale Affect Various Measures
> Example 1: At Comets Burger Barn, every worker is given a
$1/hr raise. Will this change :4 ean, median, SD, quar'
.QR? a W; is t
ll ,
T
.W
(N
’2/U
\{CMV ‘- 1 \
> Example 2: At Comets Burger Barn, every work
09 1% m >7. Wed/ck ‘31: Wm 15%
c:
m _ I. .
*eé‘febgm 4% 8% Sbs W43 09% Y M WWW/’64
' o m gavel;
12% V 0 MW M r . . Ix ,. «iatzaaéi‘ee -_ - w
RegreSSIon Line (30 7; \d .i 0L}. *1": $93
$5}
> Thus the regression line is given by: Kg ; wﬁiahli 0%
r ° loc
ANSWERS STAT 3360 FALL 2013
OCTOBER 17, 2013
QUIZ 6
TYPE YOUR NAME, PLEASE!
FIRST NAME
LAST NAME
INDIVIDUAL IQ SCORES FOLLOW (APPROXIMATELY) THE NORMAL
DISTRIBUTION, WITH THE POPULATION AVERAGE = 95 AND POPULATION
STANDARD DEVIATION = 20.
A. A SAMPLE OF S
STAT 3360 SPRING 2013
OCTOBER 24, 2013
QUIZ 7 ANSWERS
TYPE YOUR NAME AND SECTION, PLEASE!
SECTION
001
002
MANAGERS BELIEVE THAT THE AVERAGE SALARY AMOUNTS FOR ENGINEERS FOLLOW
(APPROXIMATELY) THE NORMAL DISTRIBUTION, WITH THE POPULATION STANDARD
DEVIATION
STAT 3360-Probability and Statistics for
Management and Economics
Chapter 10
Introduction to Estimation
Min Chen, Ph.D.
Assistant Professor
Department of Mathematical Sciences
Where we have been
Chapter 7 and 8:
Binomial, Poisson, normal [and exponential
STAT 3360-Probability and Statistics for
Management and Economics
Chapter 11
Introduction to Hypothesis Testing
Min Chen, Ph.D.
Assistant Professor
Department of Mathematical Sciences
11.1
Statistical Inference
Along with estimation, hypothesis testing i
Extra Questions from Probability (Chapters 13 and 14)
Consider drawing without replacement from the following box
1
2
3
44
5
1. What is the probability of drawing 5 in the third draw?
2. Suppose three draws are made from the above box. What is the chance