State/Region
rhode island
maine
new mexico
nebraska
west virginia
iowa
hawaii
utah
arkansas
Alabama
vermont,nh
nevada
mississippi
tennessee
connecticut
oklahoma
kentucky
south carolina
louisiana
missori,kansas
georgia
indiana
minnesota/dakotas
north carol
Team
X1
Baltimore O
Boston Red
Chicago Wh
Cleveland I
Detroit Tig
Kansas City
Los Angele
Minnesota
New York Y
Oakland Ath
Seattle Mar
Tampa Bay
Texas Rang
Toronto Blu
Arizona Di
Atlanta Bra
Chicago Cu
Cincinnati
Colorado R
Florida Mar
Houston As
Los Angel
Q-1
n
smean
stdev
80
3.85
0.65
SE
0.072672
conf
p(out)
df
t
90%
10%
79
-1.29236
CL u
CL l
3.756081
3.943919
Q-2
hours
S mean
stdev
2
1
2.5
1.5
1
1.6
0.65192
Q-3
E
conf
stdev
0.06
0.95
1.6
% in tails
0.05
portion L
0.025
z
-1.959964
n
2731.704
Q-4
n
x
conf
lab rev chp 12,13,17
at door
Q 1-5
drink sec by reg
dairy
$7
$12
$3
$7
8
10
14
6
10
4
8
5
8
3
3
2
6
5
10
Anova: Single Factor
SUMMARY
Groups
at door
drink sec
by reg
dairy
Count
Sum
4
5
6
4
ANOVA
Source of Variation SS
Between Grou 22.20614
Within Groups
Team
League
Oakland Ath
Florida Mar
Pittsburgh
Cincinnati
Cleveland I
Kansas City
Washington
Tampa Bay
Toronto Blu
Baltimore O
San Diego
Arizona Di
Texas Rang
Seattle Mar
Chicago Wh
Atlanta Bra
Minnesota
Houston As
Detroit Tig
Colorado R
San Francis
Milwa
DS 7-75
Alberta Wheeler
a
p(a>3.5)
a
p(a<3.5)
p(a>3.5)
# of teams
#of teams a>3.5
2.448
0.698
3.5
0.934116
0.065884
30
1.976532
The estimate that I got for # of teams with attendance greater than 3.5 million is 1.97. The
actual # of teams with attendance
1. A joint probability measures the likelihood that two or more events will happen
concurrently. TRUE
2. If there are "m" ways of doing one thing, and "n" ways of doing another thing, the
multiplication formula states that there are (m) (n) ways of doing
What is the value of the Pearson coefficient of skewness for a
distribution with a mean of 17, a median of 12, and a standard
deviation of 6?
Selected
Answer:
+2.
5
Answers:
+2.
5
-2.5
+0.
83
0.83
Pearson's coefficient of skewness is computed by 3(17 12)
QMB 2100 Business Statistics Spring 2014
Midterm #1 02/19/14
1. Probability theory is most likely to be an important tool in which of the following?
a.
b.
c.
d.
presenting data
generalizing from data
summarizing data
descriptive statistics
2. Accounting f
Statistics- Systematic approach to decision making under uncertainty Descriptive-Organizing, summarizing, presenting the data Inferential- Estimates about population based on
sample Discrete Variables can assume only certain values, Continuous Variables c
Chebychev Sample problem: a left-skewed distribution has a mean of 4.99 and a standard deviation of 3.13. Use Chebyshevs Theorem to
find the proportion of observations you would expect to find within two standard deviations from the mean:
Step 1: Square t
QMB Gordon Rule Assignment
Pierre Montalvo
MDC QMB2100
Monday & Wednesday 8:30 PM
Explain how statistics can impact your career
The application of statistical methods is being used in just about every aspect of our lives. It is
considered to be the most u
Homework Exercise 143-145
Always looking for the Z
4 Rules
Because the Bell Curve is symmetrical, to find area under the standard normal probability distribution.
1.
2.
3.
4.
Between 0 and Z, and is directly from the table.
Beyond Z (OR-Z), find Z (table)
Chapter 10 Question 1-5
A sample of 35 observations is selected from a normal population. The sample mean is 53, and the
population standard deviation is 5. Conduct the following test of hypothesis using the 0.01 significance
level.
H0: = 54
H1: 54
1.
a.
Chapter 9 Question 5
You need to estimate the mean number of travel days per year for outside salespeople. The mean of a
small pilot study was 150 days, with a standard deviation of 32 days.
If you must estimate the population mean within 4 days, how many
Chapter 10 Question 11
At the time she was hired as a server at the Grumney Family Restaurant, Beth Brigden was told, You
can average $74 a day in tips. Assume the population of daily tips is normally distributed with a standard
deviation of $4.04. Over t
Chapter 10 Question 12
Given the following hypotheses:
H0: 13
H1: > 13
A random sample of 10 observations is selected from a normal population. The sample mean was 17 and
the sample standard deviation 3.2. Using the 0.100 significance level:
a. State the
Chapter 10 Question 6-10
A recent national survey found that high school students watched an average (mean) of 7.8 DVDs per
month with a population standard deviation of 1.00 hour. The distribution of DVDs watched per month
follows the normal distribution
Chapter 7 Question 2
A normal population has a mean of 20 and a standard deviation of 4.
a. Compute the z value associated with 25. (Round your answer to 2 decimal places.)
Z
1.25 .01
b. What proportion of the population is between 20 and 25? (Round z-sco
Chapter 8 Question 5
CRA CDs Inc. wants the mean lengths of the "cuts" on a CD to be 145 seconds (2 minutes and 25
seconds). This will allow the disk jockeys to have plenty of time for commercials within each 10-minute
segment. Assume the distribution of
Chapter 7 Question 3
For the most recent year available, the mean annual cost to attend a private university in the United
States was $20,107. Assume the distribution of annual costs follows the normal probability distribution
and the standard deviation i
CHAPTER # 7 (1)
UNIFORM PROBABILITY DISTRIBUTIONS
The uniform probability distribution is the simplest distribution for a
continuous random variable. This distribution is rectangular in
shape and is completely defined by its minimum and maximum
values.
Ch
Chapter 7 Question 4
A study of long-distance phone calls made from General Electric Corporate Headquarters in Fairfield,
Connecticut, revealed the length of the calls, in minutes, follows the normal probability distribution. The
mean length of time per c
Chapter 8 Question 2
A normal population has a mean of 55 and a standard deviation of 14. You select a random sample of 25.
Compute the probability the sample mean is (Round z values to 2 decimal places and final answers
to 4 decimal places):
a. Greater t
Chapter 7 Question 1
Customers experiencing technical difficulty with their internet cable hookup may call an 800 number for
technical support. It takes the technician between 90 seconds and 13 minutes to resolve the problem.
The distribution of this supp
Chapter 8 Question 3
A normal population has a mean of 71 and a standard deviation of 4. You select a sample of 45.
Compute the probability the sample mean is (Round z values to 2 decimal places and final answers
to 4 decimal places):
a. Less than 70.
Pro
Chapter 8 Question 1
The Quality Control Department employs five technicians during the day shift. Listed below is the number
of times each technician instructed the production foreman to shut down the manufacturing process last
week.
Technician
Taylor
Hu