# Chapter 1. Density Curves

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Stat Tutor
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### Question 1.1

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Incorrect. Density curves are used to find probabilities so the total area has to equal 1.0.
Correct. Density curves are used to find probabilities so the total area has to equal 1.0.
Incorrect. Try again.
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1:21

### Question 1.2

Incorrect. Density curves were invented to find probabilities.
Correct. Density curves were invented to find probabilities.
Incorrect. Try again.
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2:11

### Question 1.3

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Incorrect. This is a correct statement.
Correct. This is a correct statement.
Incorrect. Try again.
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### Question 1.4

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Incorrect. Area under the curve between two values estimates the proportion of the population in that interval.
Correct. Area under the curve between two values estimates the proportion of the population in that interval.
Incorrect. Try again.
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