# Chapter 1. Individuals and variables

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Stat Tutor
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0:49

### Question 1.1

Incorrect. Time is measured on each student, so student is the individual.
Correct. Time is measured on each student, so student is the individual.
Incorrect. Try again.
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### Question 1.2

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Incorrect. The response measured on each student is time.
Correct. The response measured on each student is time.
Incorrect. Try again.
2

4:10

### Question 1.3

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Incorrect. Numbers having value cannot be assigned to "eye color," so "eye color" is categorical. Further, "average eye color" does not make sense.
Correct. Numbers having value cannot be assigned to "eye color," so "eye color" is categorical. Further, "average eye color" does not make sense.
Incorrect. Try again.
2

### Question 1.4

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Incorrect. Numbers having value can be assigned to "hourly wage," so "hourly wage" is quantitative. Further, average "hourly wage" does make sense.
Correct. Numbers having value can be assigned to "hourly wage," so "hourly wage" is quantitative. Further, average "hourly wage" does make sense.
Incorrect. Try again.
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### Question 1.5

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Incorrect. While "zip code" is a number, average "zip code" does not make sense. So, "zip code" is categorical. Further, "zip code" describes where a person lives. A zip code of 05167 cannot be compared with a zip code of 99242.
Correct. While "zip code" is a number, average "zip code" does not make sense. So, "zip code" is categorical. Further, "zip code" describes where a person lives. A zip code of 05167 cannot be compared with a zip code of 99242.
Incorrect. Try again.
2

5:32

### Question 1.6

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Incorrect. Since the teacher measured the time it took each student to insert a zipper, students are being studied.
Correct. Since the teacher measured the time it took each student to insert a zipper, students are being studied.
Incorrect. Try again.
2

### Question 1.7

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Incorrect. Time to insert a zipper was measured on each student.
Correct. Time to insert a zipper was measured on each student.
Incorrect. Try again.
2

### Question 1.8

Incorrect. The why of this study was to assess students' sewing skills.
Correct. The why of this study was to assess students' sewing skills.
Incorrect. Try again.
2

8:09

### Question 1.9

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Incorrect. Since the variable "method of transportation to campus" is categorical, a bar graph or pie chart should be used to display these data.
Correct. Since the variable "method of transportation to campus" is categorical, a bar graph or pie chart should be used to display these data.
Incorrect. Try again.
2

### Question 1.10

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Incorrect. Since "number of siblings" is quantitative, a dotplot, stemplot, histogram or boxplot should be used to display these data.
Correct. Since "number of siblings" is quantitative, a dotplot, stemplot, histogram or boxplot should be used to display these data.
Incorrect. Try again.
2

### Question 1.11

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Incorrect. Since "cholesterol level" is quantitative, a dotplot, stemplot, histogram or boxplot should be used to display these data.
Correct. Since "cholesterol level" is quantitative, a dotplot, stemplot, histogram or boxplot should be used to display these data.
Incorrect. Try again.
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