Chapter 1. Robustness of t Procedures

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Question 1

0:33

Question 1.1

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Incorrect. Data collection is the most important condition.
Correct. Data collection is the most important condition.
Incorrect. Try again.
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Question 2

1:24

Question 1.2

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Incorrect. Data must be properly collected for conclusions to be valid.
Correct. Data must be properly collected for conclusions to be valid.
Incorrect. Try again.
2

Question 3

3:24

Question 1.3

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Incorrect. t procedures give valid results even when the condition of Normality of the population distribution is not met provided the data are not strongly skewed and don’t include any outliers.
Correct. t procedures give valid results even when the condition of Normality of the population distribution is not met provided the data are not strongly skewed and don’t include any outliers.
Incorrect. Try again.
2

Question 4

4:40

Question 1.4

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Incorrect. The sample size of 143 is large enough to apply the Central Limit Theorem.
Correct. The sample size of 143 is large enough to apply the Central Limit Theorem.
Incorrect. Try again.
2

Question 5

5:38

Question 1.5

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Incorrect. The sample size is 16 (less than 40) and there are no outliers visible in the plot of the data.
Correct. The sample size is 16 (less than 40) and there are no outliers visible in the plot of the data.
Incorrect. Try again.
2

Question 6

6:32

Question 1.6

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Incorrect. The sample size is small (less than 40) and there is a clear outlier in the plot of the data, so the Normality condition is not met.
Correct. The sample size is small (less than 40) and there is a clear outlier in the plot of the data, so the Normality condition is not met.
Incorrect. Try again.
2