Business Research Methods Summer 2017
Homework 2
1. Exercise 7.3 Minimal risk You are a member of your colleges institutional review board. You
must decide whether several research proposals qualify for less rigorous review because they
involve only minim
Business Research Methods
Extra Credit
Question 1
From the data we received, the sample mean = 0.9587, the standard deviation =
0.1560, and sample size n = 50. We want to test the hypotheses (null and alternative) that
the mean is greater than or equal to
17.23
A) If the gambler were to bet on black on the roulette wheel and argue for the law of averages,
his reasoning would be wrong because the probability of getting black is still , such as the
probability of getting red (). The repetitions are independe
Business Research Methods
Chapter 12-13 Homework
12.9)
A.)
Highway Gas Mileage for 2010 Sedans
1| 568
2| 2234455666666667777778
3| 011335
B.)
five-number summary is 15 24 26 27 35
The Acura RL, Jaguar XJ, Lexus GS460, Lincoln Town Car, Mercedes E550, Bent
Homework #2 Chps 5-6
1. This conclusion is not the result of an experiment. The College Board officials did
not deliberately place any treatments to test their hypothesis or change the results
of the test scores. Instead, this is an observational study, b
Homework 1
January 31, 2017
1a) This is not an experiment, but an observational study. An experiment normally
deliberately imposes some treatment on individuals to measure their responses.
They do this to see if the imposed treatment causes any change in
Exam II Sample Ch10 - Ch15
1. A company database contains the following information about each employee: age,
date, hired, sex (male or female), ethic group (Asian, black, Hispanic, etc.), job
category (clerical, management, technical, etc.), and yearly s
Business Research Methods HW 7
21.7)
a. The population proportion p for this poll is all adults who believe there should be a law that bans
possession of handguns. 26% of adults thought there should be such a law.
b. The 95% confidence interval for p is (
Business Research Methods
20 March 2017
Homework 4 (Chapter 14-15)
14.26 Investment Diversification
(a) Rachel should definitely choose a small-cap stock because the correlation between the municipal
bond and the small bond is equal to 0.21, which is not
Business Research Methods
Sample Exam I (Ch1-Ch9)
Spring 2017
Total: 20 points
1 Multiple-Choices
1. In a(n)
is a subset of subjects from the population.
(A) census
(B) sample
(C) individual
(D) population
Ans: B
2. In a table of random digits,
(A) each p
Confidence Interval
How prevalent is sports gambling in America?
2007 Gallup poll took a random sample of 1027 adult Americans.
17% of the sampled adults had gambled on sports in the past year.
We know this value 0.17 is an estimate of the true proport
MEDIAN AND
QUARTILES
Median
The median M is the midpoint of a distribution, the number such that
half the observations are smaller and the other half are larger.
STEPS TO LOCATE THE MEDIAN:
1. Arrange observations in increasing order.
2. For odd number of
BUSINESS RESEARCH METHODS
MID TERM-I
NAME:
1) A psychologist wants to know if adults with normal vision can be fooled by a certain optical
illusion. She recruits 50 students from her PSY 120 class and find that 42 of them are fooled by
the illusion. The p
Chapter 3
What Do Samples Tell Us?
Statistics: Concepts and Controversies
1
From Sample to Population
A purchaser for a large convenience store chain wants
to know if the shipment of 1,000,000 batteries he is
receiving is a good one. He randomly selects 1
Chapter 4
Sample Surveys in the Real World
Statistics: Concepts and Controversies
1
How Sample Surveys Go Wrong
Margin of Error accounts for
A.Random sampling error
B.Nonsampling error
C.Bias
Statistics: Concepts and Controversies
2
How Sample Surveys Go
Chapter 1
Where do data come from?
Statistics: Concepts and Controversies
1
Individuals and Variables
An environmental group wants to study boat
traffic on a large recreational lake. The
group watched and recorded the number of
boats using the lake at sev
Chapter 5
Experiments, Good and Bad
Statistics: Concepts and Controversies
1
Talking About Experiments
A recent study showed promising results in using IV
Immunoglobulin (IVIG) therapy to halt progression of
multiple sclerosis (MS). Dosages were set at 0.
Chapter 2
Samples, Good and Bad
Statistics: Concepts and Controversies
1
How to Sample Badly
A statistical study is said to be biased if
A. If it not a census
B. It the response variable is not well defined
C. it systematically favors a certain outcome
D.
CHAPTER
2
Samples,
Good and Bad
STATISTICS
CONCEPTS AND CONTROVERSIES
Eighth Edition
David S. Moore, William I. Notz
Lecture Presentation
2
Chapter 2 Concepts
How to Sample Badly
Simple Random Samples
Random Digits
How to Select an SRS
3
How to Sample
Homework 1
Submit on Blackboard by noon of Monday January 30th 2017
Question 1
Find a news story or meme containing a statistic (or statistics) on the internet or in a
newspaper or magazine. How is the statistic used for the purposes of the meme/story, an
Frequency Histograms
Suppose that we have 30 pieces of data:
32,23,47,55,17,20,34,51,63,77,68,58,61,50,40,35,49,69,71,33,45,29,39,60,
73,64,42,37,19,21.
Suppose also that we are to have 6 classes. Therefore the class Width is
defined to be
Biggest Smalles
Box and Whisker Plots
If we have a set of numbers, say 4, 20, 0, 30, 45, 2, 17, 150, 300, 5, 8, 15. 120, 3, 56, then
the MEDIAN of this set of numbers is defined to be the middle number, once they are ordered
increasing from left to right, as 300, 56, 30,
Riyadh Williams
Business Research Methods
Homework 01 (Ch1-Ch4)
Fall 2016
Total: 20 points
1 Exercise 1.15 alcohol and cancer in women (4 points)
A Washington Post article reported on a study about alcohol consumption and cancer in women.
Since 1996, a te
Section #03
Assignment #1
Exercises 1.1-1.4, 1.6, 1.10, 1.12, 1.14
Ex 1.1
Adults living in the United States, whose tax money goes towards this research, we conclude that
the population is adult citizens of the United States.
The Sample here is the 1345 r
was due to the systemic initiatives. It may have been due to the Hawthorne effect, which is the
equivalent of a placebo effect: students may change their behavior because they know that they
Chapter 5 Solutions
are being watched. For example, even if teac
Chapter 21 Solutions
Chapter 21 Solutions
21.1-3, 21.8, 21.19, 21.20, for the proportion 22.1-3, 22.6, 22.8, 22.14
21.1. The 95% confidence interval 21.24, 21.26; of all adult Americans who believe
21.1. The 95% confidence interval for the proportion of a
Chapter 19 Solutions 19.3-4, 19.7, 19.8, 19.16, 19.23, 19.23 P(girl)=.48, P(boy)=.52);
19.3. The choice of digits in these simulations may, of course, vary from that made here. In (a)-(c), a single
digit simulates the response; for (d), two digits simulat
here is a less relative scatter about that line with Chapter 14 Solutions
point A than without.
atterplot below. Time is explanatory, so it should be on the horizontal are seeking to predict IQ from brain size. Thus, there is an
14.1. The researchers axis