Peformance
On-time
Early
Early
Early
On-time
On-time
Early
On-time
On-time
On-time
On-time
On-time
On-time
On-time
Late
Late
Early
On-time
Early
On-time
Early
On-time
Early
On-time
Late
Early
On-time
Chapter 2
1. A pie chart shows the relative frequency in each class.
A. True
B. False
2. In a bar chart, the horizontal axis is labeled with the values of a qualitative
variable.
A. True
B. False
3. A
1. A listing of 100 family annual incomes is an example of statistics.
A. True
B. False
2. If we select 100 persons from 25,000 registered voters and question them about
candidates and issues, the 100
I. The Background Stuf
The body tries to maintain homeostasis with the Acid Base balance using acids and
bases contained within the body. Each acid and base counter balances with each other
(the alkal
Statistics in the Media
In the article Study: Teens who text and drive take even more risk taken from the
USA Today newspaper, posted on May 13, 2013, states that more than 4 in 10 teens admit
to text
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
misso
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
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
Minnes
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
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
multiplicati
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
Pe
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
Statistics- Systematic approach to decision making under uncertainty Descriptive-Organizing, summarizing, presenting the data Inferential- Estimates about population based on
sample Discrete Variables
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
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
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 d
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 us
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 mu
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
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
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
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 proporti
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 wit
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 norma