Investigation Chapter 2: Cell phones while driving
Drivers today have many more distractions to deal with than drivers of a century ago. Lets
focus on new drivers, aged 16 to 17. Do you think a majority of drivers aged 16 to 17 have ever
talked on the cel
Chapter 10: Exercise Solutions
Section 10.1
10.1.1: The correlation will be negative: larger distances go with lower exam scores and viceversa.
10.1.2: The correlation will be positive: higher temperatures go with larger amounts of ice
cream sold, and vic
Investigation Chapter 3: Faking Cell Phone Calls
Have you ever pretended to be talking on your cell phone in order to avoid interacting with people around you?
Is faking cell phone calls a common practice among cell phone users? A recent survey conducted
Guess Coke correctly
Guess Coke incorrectly
Coke first
Pepsi first
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Kelsey Rogus
Research Question: Is there an association between pursing a double or triple major from
being in Greek life?
Explanatory Variable: Participants in Greek life doing a double or triple major.
Response Variable: Are you a member of Greek life.
Solutions to the Preliminaries Exercises
P.1
a. Observational units: 47 students, Variables: (1) How much each student spent ($), (2) what
the student was told (rebate or bonus)
b. Observational units: Typical American consumers, Variable: (1) How much ea
Chapter 8 Exercise solutions
8.1.1 MAD statistic.
If you dont take absolute values there are two potential problems, automatic
zeros and ambiguity.
(1) Automatic zeros. Recall Example 8.1 Coming to a Stop. The differences
were: , , and . If you add these
Chapter 9 Exercise Solutions
Section 9.1
Conceptual Exercises
9.1.1
If you dont take absolute values there are two potential problems, automatic zeros and
ambiguity. (1) Automatic zeros: Finding the sum of the differences could always result in
zero if yo
Solutions to Chapter 4 Exercises
Section 4.1
Conceptual Exercises
4.1.1
a) The smoking status of the parent is related to both the explanatory and response
variable in the study.
b) Even if you randomly assigned children to pretend smoke candy cigarettes
Chapter 5: Exercises Solutions
Section 5.1
Conceptual Exercises
5.1.1: School spirit.
a) The observational units are the college students.
b) The response variable is whether or not the student is wearing clothing that displays the
college name or logo on
Solutions to the Chapter 6 exercises
Section 6.1
Conceptual exercises
6.1.1
a) 65.86 is the mean and 67.50 is the median. Since the dataset is left-skewed the mean is
pulled in the direction of the skew (lower), while the median is not.
b) Mean: Larger, M
Chapter 7: Exercises SOLUTIONS
Section 7.1
Conceptual Exercises
7.1.1
a)
b)
c)
d)
Paired analysis appropriate
Paired analysis not appropriate
Paired analysis appropriate.
Paired analysis not appropriate
7.1.2
a) Null hypothesis: Females and males are equa
Solutions to Chapter 2 Exercises
Section 2.1
Conceptual Exercises
2.1.1
A
2.1.2
a) B b) B
2.1.3
B
Application Exercises
2.1.4
a) The symbol represents the proportion of all American adults that drink at least one
b)
c)
d)
e)
f)
glass of soda on a typical
Solutions to Chapter 1 exercises
Section 1.1
Conceptual Exercises
1.1.1
a) The true proportion of times the racquet lands face up
b) 50%
c) Fair
d) 48 out of 100 does not constitute strong evidence that the spinning process is not fair,
because if the spi
Solutions to Exercises Chapter 3
Section 3.1
Conceptual Exercises
3.1.1
a) Height: not representative since nursing majors are required to take the course and
b)
c)
d)
e)
f)
g)
nursing majors have a very high proportion of females who on average are short
Unit1Overview
SignificanceHowstrongistheevidenceofan
effect?(Chapter1)
p EstimationHowlargeistheeffect?(Chapter
2)
p GeneralizationHowbroadlydothe
conclusionsapply?(Chapter3)
p CausationCanwesaywhatcausedthe
observeddifference?(Chapter4)
p
Chapter1
Signif