# Chapter 1. Avoid the Pooled Two-Sample t Procedures

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1:02

### Question 1.1

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Correct. David S. Moore, the author of Basic Practice of Statistics, recommends the approximate two-sample t.
Incorrect. David S. Moore, the author of Basic Practice of Statistics, recommends the approximate two-sample t.
2
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1:36

### Question 1.2

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Correct. The pooled two-sample t test requires equal population standard deviations.
Incorrect. The pooled two-sample t test requires equal population standard deviations.
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2:18

### Question 1.3

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Correct. This is a true statement. The approximate two-sample t does not have this requirement.
Incorrect. This is a true statement. The approximate two-sample t does not have this requirement.
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3:11

### Question 1.4

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Correct. Of the two options, the approximate two-sample t test gives a more accurate P-value than the conservative two-sample t test. The pooled two-sample t test is more accurate if the condition of equal standard deviations is met.
Incorrect. Of the two options, the approximate two-sample t test gives a more accurate P-value than the conservative two-sample t test. The pooled two-sample t test is more accurate if the condition of equal standard deviations is met.
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