Practice Problems
1. A random sample of 1,562 undergraduates enrolled in marketing courses
was asked to respond on a scale from one (strongly disagree) to seven
(strongly agree) to the proposition: "Advertising helps raise our standard of
living." The sam

pg 332 in book (354 in Adobe)
An important feature of tablets is battery life, the number of hours before the battery needs to be recharged. The file Tablets
and 7 3G/4G/WiFi 9- through 12-inch tablets. (Data extracted from Ratings and recommendations: Ta

pg 423 (pg 445 In Adobe)
Fitting a straight line to a set of data yields the following prediction line:
Yi = 16 - 0.5Xi
a. Interpret the meaning of the Y intercept, b0.
b. Interpret the meaning of the slope, b1.
c. Predict the value of Y for X = 6.
a. Y i

pg 404 (pg 426 In Adobe)
When performing a 2 test of independence in a contingency table with r rows and c columns, determine the upper-tail critic
statistic in each of the following circumstances:
a. = 0.05, r = 4 rows, c = 5 columns
12
21.0260698175
b.

Team Name
Atlanta Hawks
Boston Celtics
Brooklyn Nets
Charlotte Bobcats
Chicago Bulls
Cleveland Cavaliers
Dallas Mavericks
Denver Nuggets
Detroit Pistons
Golden State Warriors
Houston Rockets
Indiana Pacers
Los Angeles Clippers
Los Angeles Lakers
Memphis G

pg 364 (pg 386 In Adobe)
Consider an experiment with four groups, with eight values in each. For the ANOVA summary table below, fill in all the missi
Source
Among groups
Within Groups
Total
Groups
A GROUP
B GROUP
C GROUP
D GROUP
ANOVA
Source of Variation

Data
m =
Null Hypothesis
Level of Significance
Population Standard Deviation
Sample Size
Sample Mean
500
0.1
20
30
493
Intermediate Calculations
Standard Error of the Mean
3.6514837
Z Test Statistic
-1.917029
Two-Tail Test
Lower Critical Value
Upper Criti

pg 151 in book (173 in Adobe)
Referring to the contingency table in Problem 4.8, if an employed
adult is selected at random, what is the probability that:
Gender
Male
Female
Felt Tense or Stressed Out
at Work
Yes
244
282
a. the employed adult felt tense o

pg 12 in book (34 in Adobe)
The following information is collected from students upon exiting the
campus bookstore during the first week of classes.
a. Amount of time spent shopping in the bookstore
b. Number of textbooks purchased
c. Academic major
d. Ge