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Suppose a study finds that hair length has a negative correlation with body weight: People with shorter hair weigh more.. Should you grow your hair to lose weight?

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No, because correlation doesn't equal causation. Other variables could be affecting this relationship. For example, a person's sex is a third variable. Men typically have shorter hair and weight more.

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What is the size of effect?

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Size of effect measures the strength of relationships between variables

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When we are talking about a data set, cases are___
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the objects described by the data set
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When we are talking about a data set, a variable is___
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A characteristic of a case
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____ are people, animals, or objects that have had information about them recorded.
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Cases
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When we are talking about a data set, a label is____.
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a special variable used to distinguish the different cases
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You are given a dataset describing 15 different trucks. For each of them, the company which made the truck (make) and the gas mileage (mileage) is recorded. What is the quantitative variable in this study?
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mileage 
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What are cases?
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-The objects described by a set of data
-Cases may be customers, companies, subjects in a study, etc.
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What is a label?
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=A special variable used in some data sets to distinguish the different cases

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For each student of a dataset of 50 collage  students, the gender, current GPA, home address, and major are recorded. Which of the following is a case of the dataset?
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student
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A professor has a dataset which records some information about the 40 students in her statistics class. For each student, she records the student’s gender, and their score on the first exam. Gender is a ____ variable.
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Categorical
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What are the factors that affect the persuasiveness of a message?

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1) source: sources who are both attractive+ credible are the most persuasive 

2) content: strong arguments appeal to emotions-> are the most persuasive + mere-exposure effect (repeating messages over and over)

3) receiver 

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Q:

Suppose a study finds that hair length has a negative correlation with body weight: People with shorter hair weigh more.. Should you grow your hair to lose weight?

A:

No, because correlation doesn't equal causation. Other variables could be affecting this relationship. For example, a person's sex is a third variable. Men typically have shorter hair and weight more.

Q:

What is the size of effect?

A:

Size of effect measures the strength of relationships between variables

Q:
When we are talking about a data set, cases are___
A:
the objects described by the data set
Q:
When we are talking about a data set, a variable is___
A:
A characteristic of a case
Q:
____ are people, animals, or objects that have had information about them recorded.
A:
Cases
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Q:
When we are talking about a data set, a label is____.
A:
a special variable used to distinguish the different cases
Q:
You are given a dataset describing 15 different trucks. For each of them, the company which made the truck (make) and the gas mileage (mileage) is recorded. What is the quantitative variable in this study?
A:
mileage 
Q:
What are cases?
A:
-The objects described by a set of data
-Cases may be customers, companies, subjects in a study, etc.
Q:
What is a label?
A:
=A special variable used in some data sets to distinguish the different cases

Q:
For each student of a dataset of 50 collage  students, the gender, current GPA, home address, and major are recorded. Which of the following is a case of the dataset?
A:
student
Q:
A professor has a dataset which records some information about the 40 students in her statistics class. For each student, she records the student’s gender, and their score on the first exam. Gender is a ____ variable.
A:
Categorical
Q:

What are the factors that affect the persuasiveness of a message?

A:

1) source: sources who are both attractive+ credible are the most persuasive 

2) content: strong arguments appeal to emotions-> are the most persuasive + mere-exposure effect (repeating messages over and over)

3) receiver 

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