'
9.2
9.4
9.6
300
§
The characteristics of the multinomial experiment are:
l. The experiment consists of n identical trials.
2. There are k possible outcomes to each trial.
3. The probabilities of the k outcomes, denoted p., p;, , pk, remain the same f
MATH202 Sections 194-195
Introduction to Statistical Methods II
(3 credits)
Instructor:
Anthony Seraphin
Office:
434 Ewing Hall
Phone:
(302) 831-1021
E-mail:
seraphin@udel.edu
Textbook:
McClave, Benson and Sincich
Statistics for Business and Economics, 11
10th Edition Homework Problem Sets
Topic
Chapter 7: Inferences Based on
Two Samples
Identifying the target parameter
Comparing Two Population Means:
Independent Sampling
Section
Comparing Two Population Means:
Paired Difference Experiments
7.3
Comparing T
MATH202 Formula Sheet
z
t
1
1
s
n n
2
1
df n1 n2 2
( x1 x 2 ) D0
2
1
2
p
2
2
s
s
n1 n2
t
( x1 x 2 ) D0
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(n 1) s12 (n 2 1) s 2
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d D0
d D0
t
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Assigned Even-Numbered Homework Solutions Not Supported by MathXL
Statistics for Business and Economics. McClave, Benson, Sincich. 12th edition, Prentice
Hall.
Chapter 8: Inferences Based on Two Samples
8.94
Well first compute the paired differences:
Pair
Hypothesis Testing Review Exercises Solutions
1. Business Week/Harris poll
Variables: whether or not a respondent thinks the U.S. is competing well (good/excellent) in the global
economy and time (1996 or 2000)
Parameters:
p1996 = proportion of all U.S. a
12.2 If rational subgrouping is not used, it is possible that a change in the process mean will go
undetected. In rational subgrouping, samples are selected so that a change in the process mean
occurs between samples, not within samples.
12.4 An fchart is
e.
13.16 a.
482
The plot of the Laspeyres index and the Paasche index is:
The two indices are almost. identical.
' '1' 1 I HotofLaspeyres,P_aasehe
Variable
~_ +la$evrs '
g -I- Pam
.m-rank-Aummu ArgSQJOctguovDec
Month -
The values of Laspeyres index for
INDEPENDENT SAMPLES OR DEPENDENT / PAIRED SAMPLES?
For each of the scenarios given below, identify whether the two samples being used to compare the two
groups are independent or dependent. Also give the appropriate hypotheses for answering the question
o
8.12
8.14
8.16
Design of Experiments and Analysis of Variance
The response is the evaluation by the undergraduate student of the ethical behavior of the
salesperson.
There are two factorstype of sales job at two levels (high tech. vs. low tech.) and sales
10.6
10.8
10.10 a.
334
e.
f.
y = 4 + x. The slope is A. = 1. The intercept is A, = 4.
y = 5 2x. The slope is A = 2. The intercept is A, = 5.
y = 4 + 3x. The slope is A = 3. The intercept is A, = -42
y = 2x. The slope is A. = 2. The intercept is A, = 0.
y
d. Let 0,2 = variance of spillage for accidents caused by collision and 022 = variance of
spillage for accidents caused by grounding.
To determine if the variances of the amounts of spillage due to collision and grounding
differ, we test:
Ho: 0,2 = 022
H.
8.66 a.
280
Bakers yeast:
The mean yield for temperature 54° is signicantly lower than the mean yields for the
other 3 temperatures. There is no difference in the mean yields for the temperatures
45°, 48° and 51°.
Brewers yeast:
The mean yield for tempera
MATH201:STATISTICAL METHODS I
WHAT IS STATISTICS?
Statistics is a science of data. It involves
1. collecting
2. organizing
3. classifying
4. summarizing
5. analyzing and 6. interpreting numerical and
Categorical information (data) in order to make
decisio