Unit 2: Week 2 - Week 2 Homework
Week Two:
Complete the following questions from the end of the chapter.
Chapter 6
page 187, #36
page 187, #39
Chapter 7
page 215, #32, 37
Homework needs to be submitted in the dropbox for Week 2 Homework prior to midnight
WEEK 2 HOMEWORK
E6-36. The payout for Powerball lottery and their corresponding odds and probabilities are shown below. The
price of a ticket is $1.00. Find the mean and standard deviation of the payout.
Divisions
Five Plus Powerball
Match 5
Four Plus Pow
Unit 5: Week 5 - Week 5 Homework
Week Five:
Complete the following questions from the end of the chapter.
Chapter 13
page 423, #40
page 424, #44
page 425, #47
Homework needs to be submitted in the dropbox for Week 5 Homework prior to midnight (CST -Parkvi
Wages and Wage Earners
Wages and Wage Earners:
EC 315
Insert Name
Term Project Report
Fall 1 2010
1
Wages and Wage Earners
TABLE OF CONTENTS
DICUSSION OF RESULTS
3
SUMMARY
11
REFERENCES
12
APPENDIX
13
2
Wages and Wage Earners
3
Wages and Wage Earners:
Dis
WEEK 1 HOMEWORK - CH3
P3-65. U.S. housing prices reached their peak in July of 2006. The following data shows the ratio of the
prices reported in a recent month to the July 2006 figure. These are to be used to represent typical
amounts of decline from tha
PART I. HYPOTHESIS TESTING
PROBLEM 1 A certain brand of fluorescent light tube was advertised as having an effective
life span before burning out of 4000 hours. A random sample of 84 bulbs was burned out
with a mean illumination life span of 1870 hours an
Week 4- Midterm Exam
EC 315 Quantitative Research Methods
PROBLEM 1 (Weight 20 points).
NBC TV news, in a segment on the price of gasoline, reported last evening that the mean
price nationwide is $1.50 per gallon for self-serve regular unleaded. A random
Discussion (WK2)
Question 1:
Give an example representing a discrete probability distribution and a continuous probility distribution.
Explain why your choice is discrete and continuous.
Discrete probability distribution:
Example: If X denotes the number
Discussion (WK4)
Question 1:
What is a type I and type II errors in hypothesis testing? What would be examples of each?
Explain.
Hypothesis is a statement yet to be tested.
Type I error refers to wrongly rejecting a hypothesis instead of accepting it.
Typ
WEEK 6 HOMEWORK
12-22. A physician who specializes in weight control has three different diets she recommends. As an
experiment, she randomly selected 15 patients and then assigned 5 to each diet. After three weeks the
following weight losses, in pounds,
Chapter 6 Page 190, Questions 36 and 39
36. The payouts for the Powerball lottery and their corresponding odds and probabilities of
occurrence are shown below. The price of a ticket is $1.00. Find the mean and standard deviation of
the payout. Hint: Dont
Taryn Kendrick
Chapter 3 Homework: Pages 92-93, Questions 64, 66, and 67
Note: In problem #67, the baseball data can be obtained from http:/highered.mcgrawhill.com/sites/0073521477/student_view0/index.html (Links to an external site.). Then go to Data set
Quiz (WK6)
1.
Analysis of variance is used to (Points : 1)
compare nominal data.
compute t test.
compare population proportion.
Simultaneously compare several population means.
Suppose a package delivery company purchased 14 trucks at the same time. Five
WEEK 4 HOMEWORK
10-34. A recent article in vitality magazine reported that the mean amount of leisure time per week for
American men is 40.0 hours. You believe this figure is too large and decide to conduct your own test. In
a random sample of 60 men, you
Discussion (WK3)
Question 1:
As a sample size approaches infinity, how does the students t distribution compare to the
normal z distribution? When a researcher draws a sample from a normal distribution, what can
one conclude about the sample distribution?
WEEK 3 HOMEWORK
9-37.
The National Collegiate Athletic Association (NCAA) reported that the mean number of hours spent per
week on coaching and recruiting by college football assistant coaches during the season is 70. A random
sample of 50 assistant coach
Quiz (WK3)
All possible samples of size n are selected from a population and the mean of
each sample is determined. What is the mean of the sample means? (Points : 1)
1.
Exactly the same as the population mean
Larger than the population mean
Smaller than
1. From past records it is known that the average life of a battery used in a digital clock is 305 days. The
battery life is normally distributed. The battery was recently modified to last longer. A sample of 20 of the
modified batteries was tested. It wa
Quiz (WK2)
1. Which of the following is NOT true regarding the normal distribution? (Points : 1)
Mean, median and mode are all equal
It has a single peak
It is symmetrical
The points of the curve meet the X-axis at z =
3 and z = 3
2. For a standard normal
Discussion (WK7)
Question 1:
When a researcher has two samples with two means, one of the assumptions for two samples is
independence of between the two samples. What does this mean? What happens if the independence
assumption is violated?
When a research
Quiz (WK2)
1. The shape of any uniform probability distribution is (Points : 1)
Negatively skewed
Positively skewed
Rectangular
Bell shaped
2. The upper and lower limits of a uniform probability distribution are (Points : 1)
positive and negative infinity
Discussion (WK6)
Question 1:
The F test is used in Analysis of Variance (ANOVA). When would a researcher use an ANOVA? Explain.
ANOVA Means Analysis of Variance. It is used to analyze total variability of a set of data. It segregates the variability
into
.
64 The Kentucky Derby is held the first Saturday in May at Churchill Downs in Louisville Kentucky. The race track is one and
payoff on a $2 bet.
Year
1990
1991
1992
1993
1994
1995
1996
1997
1998
1999
2000
2001
2002
2003
2004
2005
2006
2007
2008
2009
201
EC 315 MIDTERM EXAMINATION
Directions:
This test is open-book and open notes and covers the content from weeks 1 through week 4 of EC/315. The test will be ty
Dropbox marked Midterm Exam. The midterm is due the last day of Week 4.
1 NBC TV news, in a segm
Homework 6
Question 22
A.
B.
Question 28
A. The level of significance is .01
Ho is rejected if F> 6.36(the degrees of freedom is 2/15 as given in red in the ANOVA table)
Test Statistic (this is given as blue and bold from the ANOVA table)
ANOVA
Source of
Chapter 12
22.) Jacob Lee is a frequent traveler between Los Angeles and San Francisco. For the past month, he
wrote down the flight times on three different airlines. The results are:
Goust
51
51
52
42
51
57
47
47
50
60
54
49
48
48
Jet Red
50
53
52
62
53
Problem 33
a.
= 68.6 3.108 or (65.492, 71.708)
b.
Yes, because 70 is inside the confidence interval of 99% so it can be concluded that the value suggested by the N
c.
The confidence interval if changed to the 95% versus the 99% would decrease and since Z(
Problem 34
H0: 40
H1: < 40
Test Statistic = [ 37.8 - 40 ] / [ 12.2/(60) ] = -1.40
p-value = P( t < -1.40 ) = 0.0808
Can you conclude that the information in the article is untrue?
No, since the p-value 0.0808 is greater than 0.05 significance level we do
Chapter 6
Problem 36 Divisions
Five Plus Powerball
Match 5
Four Plus Powerball
Match 4
Three plus Powerball
Match 3
Two Plus Powerball
One plus Powerball
Zero Plus Powerball
Payout
Odds
Probability
$50,000,000 146,107,962 0.000000006844
0.3422
200,000
3,5