# Chapter 1. Two-Sample Problems: Proportions

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Stat Tutor
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1:52

### Question 1.1

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Incorrect. Proportions are used to numerically summarize categorical data. With two separate sets of categorical data, two proportions are comparedâ€”one for each data set.
Correct. Proportions are used to numerically summarize categorical data. With two separate sets of categorical data, two proportions are comparedâ€”one for each data set.
Incorrect. Try again.
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### Question 1.2

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Incorrect. Two population proportions are compared by comparing their difference with zero.
Correct. Two population proportions are compared by comparing their difference with zero.
Incorrect. Try again.
2

### Question 1.3

Incorrect. $$\widehat{p}_{1}$$ - $$\widehat{p}_{2}$$ represents the difference between two sample proportions.
Correct. $$\widehat{p}_{1}$$ - $$\widehat{p}_{2}$$ represents the difference between two sample proportions.
Incorrect. Try again.
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4:10

### Question 1.4

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Incorrect. This is a correct statement.
Correct. This is a correct statement.
Incorrect. Try again.
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5:05

### Question 1.5

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Incorrect. This is a true statement.
Correct. This is a true statement.
Incorrect. Try again.
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6:21

### Question 1.6

Incorrect. $$\widehat{p}_{1}$$ and $$\widehat{p}_{2}$$ conditionals because they are computed from information in their respective rows.
Correct. $$\widehat{p}_{1}$$ and $$\widehat{p}_{2}$$ conditionals because they are computed from information in their respective rows.