Chapter 1. Robustness Again

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Questions 1-3

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Question 1.1

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Correct. Equal sample sizes should be used whenever possible to give the most accurate results.
Incorrect. Equal sample sizes should be used whenever possible to give the most accurate results.
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Question 1.2

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Correct. When the populations have similar shapes, two-sample t procedures give more accurate results than when the shapes are different.
Incorrect. When the populations have similar shapes, two-sample t procedures give more accurate results than when the shapes are different.
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Question 1.3

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Correct. Two-sample t procedures are not robust and do not give good results when there are outliers
Incorrect. Two-sample t procedures are not robust and do not give good results when there are outliers
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Question 4

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Question 1.4

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Correct. The most important condition is appropriate data collection; the analysis may be worthless if the data are not any good.
Incorrect. The most important condition is appropriate data collection; the analysis may be worthless if the data are not any good.
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