# Chapter 1. Population versus sample

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Stat Tutor
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0:57

### Question 1.1

Incorrect. We take a sample whenever we cannot do a census.
Correct. We take a sample whenever we cannot do a census.
Incorrect. Try again.
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2:39

### Question 1.2

Incorrect. The population of interest is the entire group of individuals about which the researcher wants information. In this case, the officials want information about all of their students. A researcher specifies the population before collecting information with a sample. So, the population cannot be "all students who recycle paper."
Correct. The population of interest is the entire group of individuals about which the researcher wants information. In this case, the officials want information about all of their students. A researcher specifies the population before collecting information with a sample. So, the population cannot be "all students who recycle paper."
Incorrect. Try again.
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### Question 1.3

Incorrect. The sample consists of the individuals actually contacted. In this case, the officials sampled 200 students.
Correct. The sample consists of the individuals actually contacted. In this case, the officials sampled 200 students.
Incorrect. Try again.
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### Question 1.4

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Incorrect. Each student was asked whether they recycle paper and that is what was recorded for each student.
Correct. Each student was asked whether they recycle paper and that is what was recorded for each student.
Incorrect. Try again.
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### Question 1.5

Incorrect. Statistical inference is using sample information to draw conclusions about a population.
Correct. Statistical inference is using sample information to draw conclusions about a population.
Incorrect. Try again.
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3:54

### Question 1.6

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
Incorrect. Since the officials want to know what percent of their students recycle paper. These officials need to clearly define what is meant by a student at their university.
Correct. Since the officials want to know what percent of their students recycle paper. These officials need to clearly define what is meant by a student at their university.
Incorrect. Try again.
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### Question 1.7

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Incorrect. These are all important questions to answer before writing survey questions and taking the survey.
Correct. These are all important questions to answer before writing survey questions and taking the survey.
Incorrect. Try again.
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