Chapter 11 BSD 1e
Question 1
1 / 1 point
Consider the partially completed one-way ANOVA summary table.
Source
Sum of
Squares
Between
270
Within
Degrees of
Freedom
Mean Sum
of Squares
F
18
Total
810
21
Excel file with table data: 11 Q 1_2_Partial-OneWay-AN
ter 16 BSD 1e
tions
tion 1
A _ component is present in a time series if a consistent pattern in the data can be associated
with a calendar.
trend
random
cyclical
seasonal
View Feedback
tion 2
Normalized seasonal factors are seasonal factors that are adjus
Points Awarded
8.00
Points Missed
2.00
Percentage
80.0%
1.
Use the following information to answer the question(s) below.
Ford would like to develop a regression model that would predict the number of cars sold per month by a
dealership employee based on
Chapter 12 BSD 1e
Question 1
1 / 1 point
The chi-square test requires that each expected frequency be equal to or greater than _.
5
Question 2
1 / 1 point
Nationwide Insurance would like to perform a chi-square test to investigate whether a difference exi
Points Awarded
4.00
Points Missed
6.00
Percentage
40.0%
1.
When performing a hypothesis test that compares the variances of two populations, always assign the
smaller sample variance to Population 1 and the larger sample variance to Population 2.
A) True
Points Awarded
8.00
Points Missed
2.00
Percentage
80.0%
1.
AutoTrader.com would like to test if a difference exists in the age of three different types of vehicles
currently on the road-trucks, cars, and vans. The following data represent the age of a ran
Points Awarded
10.00
Points Missed
Percentage
0.00
100%
1.
You have been assigned to test the hypothesis that the average number of hours per week that an American
works is higher than the average number of hours per week that a Swede works. The following
Chapter 13 BSD 1e
Question 1
1 / 1 poin
A professor would like to test the hypothesis that the average number of minutes that a student needs to
complete a statistics exam has a standard deviation that is less than 5.0 minutes. The correct hypothesis
stat
Chapter 15 BSD 1e
n1
Residual values in a regression model can be positive or negative.
True
False
View Feedback
n2
A _ predicts the change in a dependent variable due to a one-unit increase in an
independent variable while holding other variables constan
Points Awarded
9.00
Points Missed
1.00
Percentage
90.0%
1.
A company has recorded 12 months of sales data for the past year and has found the linear trend equation
is
= 286 + 64.9t. Based on this information, which of the following is the forecast for per
Points Awarded
9.00
Points Missed
1.00
Percentage
90.0%
1.
YouTube would like to test the hypothesis that the average length of an online video watched by a user is
more than 6 minutes. A random sample of 40 people watched online videos that averaged 6.6
Points Awarded
4.00
Points Missed
6.00
Percentage
40.0%
1.
The airline industry defines no-shows as passengers who have purchased a ticket but fail to arrive at the
gate on time for departure. United Airlines operates many flights from Philadelphia to Dal
m QMB 3200 BSD 1e Chapters 5-10
s
n1
The average battery life of the iPhone 4S is reported to be 6.0 hours. Assume that the
standard deviation for the battery life for this cell phone is 30 minutes. A random sample of
42 iPhones had an average battery lif
Chapter 14 BSD 1e
Questions
Question 1
1 / 1 point
The technique of _ enables us to describe a straight line that best fits a series of ordered pairs
(x,y).
simple regression
analysis
Question 2
1 / 1 point
The _ measures how consistent the slope of the r
Points Awarded
3.00
Points Missed
7.00
Percentage
30.0%
1.
The _ measures how consistent the slope of the regression equation would be if several sets of
samples from the population were selected and the regression equation were derived for each of them.
The average cost of a hotel room in Chicago is
claimed to be $188 per night. A travel agent
thinks it is lower now.
A random sample of 25 hotels resulted in
x = $177.50 and s = $25.40
Test the appropriate hypothesis using an a =
0.05 level of significance
Normal Probabilities
Common Data
Mean
Standard Deviation
13.65
2.2
Probability for X <=
X Value
Z Value
P(X<=13)
13
-0.2954545
0.3838
Chapter 7: Problem 7.3.3
The following table shows the total points scored in the
16 National Football League games playe
A new CFL bulb is claimed to have an average life that exceeds
8,000 hours
Suppose the average life of a random sample of 36 of the
new bulbs is 8,120 hours
Assume that the population standard deviation for the life of
CFL bulbs is 500 hours
Population St
Your Turn # 1
1. In an effort to increase the number of people who file their returns electronically, suppose the Internal Revenue
Service (IRS) launches a promotional campaign on the benefits of this filing method. As a follow-up to the campaigns
effecti
Separate-Variances t Test for the Difference Between Two Means
(assumes unequal population variances)
Data
Hypothesized Difference
0
Level of Significance
0.1
Population 1 Sample
Sample Size
40
Sample Mean
111
Sample Standard Deviation
34.0000
Population
The proportion of cell phone users with 4G contracts
last year was p = 0.62. A Verizon executive thinks the
proportion has increased this year.
Suppose that from a random sample of 350 users, 238
have 4G contracts
Test using a = 0.05
population proportion
Confidence Interval Estimate for the Mean
Data
Sample Standard Deviation
Sample Mean
Sample Size
Confidence Level
0.0342
130
210
95%
Intermediate Calculations
Standard Error of the Mean
0.0023600242
Degrees of Freedom
209
t Value
1.9714
Interval Half Widt
1Chapter 14 BSD 1e
s
n1
The technique of _ enables us to describe a straight line that best fits a series of
ordered pairs (x,y).
analysis of variance
correlation analysis
hypothesis testing
simple regression analysis
View Feedback
n2
n3
The _ measures ho
Question 1
The time for a professor to grade an exam is normally distributed with a mean of 12.6 minutes and a standard
deviation of 2.5 minutes. What is the probability that a randomly selected exam will require less than 16 minutes to
grade? Use Excel/
Question 1
The ounces of soda consumed by an adult next month are an example of a discrete random variable.
True
False
Referenc
e: Page
195
Question 2
The following table shows the number of pieces of junk mail that arrives in my mailbox each day.
Number
Chapter 8 BSD 1e
Question 1
The definition of a 90% confidence interval is that we expect that close to 90% of a large number of
sample means drawn from a population will produce confidence intervals that include that population's
mean.
Correct Response
T
Chapter 9 BSD 1e
Question 1
When the p-value is greater than alpha, the conclusion for the hypothesis test is to reject the null
hypothesis.
Correct Response
False
Question 2
A professor would like to test the hypothesis that the average number of minutes
Chapter 10 BSD 1e
Question 1
1 / 1 point
The federal government would like to test the hypothesis that the average age of men filing for Social
Security is higher than the average age of women set using = 0.05 with the following data:
Men
Women
Sample mea