A simple random sample of 60 items resulted in a sample mean of 80. T
Compute the 95% confidence interval for the population mean.
Assume that the same sample mean was obtained from a sample of 120
What is the effect of a larger sample size on the interva
Take one clean US penny and spin it on a smooth table 100 times by holding it on its edge and flicking it with a f
spin again; or, if it comes into contact with an object other than the table, spin again). After each spin, record wh
1. What year is your p
The manager of the Danvers-Hilton Resort Hotel stated that the mean gue
that the total charges for guest bills have been increasing in recent month
managers claim.
Which form of the hypotheses should be used to test the managers claim
Ho
Ha
600
<600
Ho
Ha
Go to Yahoo! Finance ( HYPERLINK "http:/finance.yahoo.com" http:/finance.yahoo.com) (or HYPERLINK "http:/
name (e.g., I would have S, so I pick Sprint). In the top left menu click on Historical Prices. Set the date range
(in Google Finance ts on the right
The 2012 American League consists of 14 baseball teams. Suppose a samp
the 14 teams and the random numbers assigned by Excels RAND function
Anaheim, Toronto, Texas, Tampa Bay, Seattle
Team
Random Number
Anaheim
0.70100801
Ascending values
Toronto
0.226274
For its Music 360 survey, Nielsen Co. asked teenagers and adults how each group has listened to music in the past 12 months.
Google Inc.s video-sharing site to listen to music and 35% of the teenagers said they use Pandora Media Inc.s custom online ra
Sup
Tablet
Acer Iconia W510
Amazon Kindle Fire HD
Apple iPad 4
HP Envy X2
Lenovo ThinkPad Tablet
Microsoft Surface Pro
Motorola Droid Xyboard
Samsung Ativ Smart PC
Samsung Galaxy Tab
Sony Tablet S
Cost ($)
Operating System
599 Windows
299 Android
499 iOS
860
City
Albuquerque
Atlanta
Austin
Baltimore
Boston
Charlotte
Chicago
Cincinnati
Cleveland
Columbus
Dallas
Denver
Detroit
El Paso
Fresno
Indianapolis
Jacksonville
Kansas City
Las Vegas
Little Rock
Los Angeles
Louisville
Memphis
Miami
Milwaukee
Minneapolis
Na
Primary markets: markets in which users of funds (e.g., corporations and
governments) raise funds by issuing financial instruments (e.g., stocks and bonds), more bonds
are issued than any other security: stocks, private placements and IPOs,
Secondary mar
1. Revenue increase of cost reduction resulting from mergers that are not due to scale or
scope economies are called- X efficiencies
2. A decline in the average cost of producing services as the size of the bank expands is
called- cost economies of scale
Minimum votes required- Minimum votes required or needed = [1/(n+1) x # of votes available]
+1, n is the number of seats
# of votes available = # of directors to be elected x # of shares outstanding = 7x50,000= 350,000
Direct exchange rate- 1+rUS= forwar
Treasury bonds- Default risk free (low risk love return) trade is very active in the second market
Interest rate risk- because of their long maturity, T-notes and T-bonds and for that matter, any long term
security would experience wider price fluctuation
First In-Class Essay
EN 101
Grade for 1st essay:
Sep. 2013.
Outline + Essay: 10 points
Directions: Write a two to three-page essay (about 600+ words) based on the topics provided in class. Follow
the directions provided here.
Double space your essay. Use
SECTION 5: Exercises
5.1*
5.2
Find the area under the standard normal curve.
a. between z = 0 and z = 1.90 .4713
c. between z = 1.25 and z = 2.37 .0967
e. from z = -1.67 to z = 2.34 .9429
b. between z = 0 and z = -1.75 .4599
d. between z = -1.53 and z = -
SECTION 6: Exercises
6.1
A population has a distribution that is skewed to the left. Indicate in which of the following cases
the central limit theorem will apply to describe the sampling distribution of the sample mean.
a. n = 100
b. n = 25
c. n = 36
A &
SECTION 8: Exercises
8.1*
According to the Southern California Real Estate Association, the average sale price of homes in Los
Angeles was $208,922 in 2009 and $206,490 in 2008. Suppose that these means were based on random
samples of 420 Los Angeles home
Supercrunchers Chapter 6
Questions
1. Be prepared to discuss the process that Acxiom and ChoicePoint use to build their databases.
The author provides a good starting point, if necessary conduct further research on data
compilers via the Internet.
They ob
SECTION 1: Exercises
1.1
Explain whether each of the following constitutes a population or a sample.
a.
Ages of all members of a family - population
b.
Number of days missed by all employees of Acme Direct during the month of July - population
c.
Marital
5.3
Find the following areas under a normal distribution curve with = 12 and = 2.
a. Area between x = 7.76 and x = 12 =.4830
b. Area between x = 14.48 and x = 16.34 =.0925
c. Area from x = 8.22 to x = 11.06 =.2898
5.4*
Let x be a continuous random variabl
Supercrunchers Assignment
Questions Chapter 5
1. In Chapter 5, of Supercrunchers, "Experts versus Equations", the author makes a great case for the
fact that equations predict better than humans. What reasons does the author give that illustrate why a
hum
INSTRUCTIONS
1
2
3
4
5
INSTRUCTIONS
See the data set on the next tab noted by the name "Data" and complete the steps below
Place the answers in the "answer" sheet
Variable names are noted at the top of each column. For each variable provide the type of
va
Supercrunchers QuestionsChapter 2
1. What does the Author mean that you can create your own data with the flip of a coin?
The idea of flipping the coin refers to creating a randomized sample which you can feel confident that
will represent the larger popu
Greg Spoleti
Business Statistics
21-Oct-14
Chapter 8 3,7,10,16,18,20,21
3a
3.795524
83.79552
76.20448
3b
2.683841
82.68384
77.31616
3c
Larger sample size is a lower confidence level so it's more likely to fall between those numbers
7a
166.3115
1765.312
14
Chapter 9 Homework
1)
a) Ho: u <= 600
Ha: u > 600
b) That the bills are not increasing
c) The bills are increasing
2)
a) Ho: u = > 14
Ha: u = < 14
b) Ho cannot be rejected if sales increase
c) Ho can be rejected if sales dont increase
3)
a) Ho: u = 32oz
H
Chapter 13 1,9,10,11, Case Problem 1
1a
A
B
C
162
142
165
145
148
174
156
Mean:
142
156
124
142
136
152
142
126
122
138
140
150
128
134
432
248
124
144
Anova: Two-Factor Without Replication
Anova: Single Factor
SUMMARY
Groups
Count
Sum
A
B
C
6
6
6
Average
March 24, 2014
Macroeconomics
Article 1
The Federal Reserve sees a bright future for the United States national economy
as a whole and is making a campaign issuing a foreseeable future after the Great
Recession. Fed Cuts Bond Buying by Another $10 Billion
March 24, 2014
Macroeconomics
Article 2
Unemployment has been a steady issue across all 28 countries in Europe due to
the lack of jobs and markets being created in the past few decades. Euro Zone Economy
Expands Further in March, explains for Paris that t