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Stat Tutor

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1:14

Correct. The tests are the same.

Incorrect. The tests are the same.

2

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3:05

Correct. This is a correct statement.

Incorrect. This is a correct statement.

2

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4:07

Correct. Without a measure of variability, we cannot get a P-value. And without a P-value we cannot decide whether to reject H_{0}.

Incorrect. Without a measure of variability, we cannot get a P-value. And without a P-value we cannot decide whether to reject H_{0}.

2

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4:25

Correct. We do need the means and standard deviations and we do need a linear relationship for correlation, but we don’t need to do prediction.

Incorrect. We do need the means and standard deviations and we do need a linear relationship for correlation, but we don’t need to do prediction.

2

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4:57

Correct. All inferential procedures have conditions that need to be met, including testing correlation.

Incorrect. All inferential procedures have conditions that need to be met, including testing correlation.

2

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5:13

Correct. Since P-value < 0.0001 is less than α = 0.05, we can reject H_{0}.

Incorrect. Since P-value < 0.0001 is less than α = 0.05, we can reject H_{0}.

2

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5:37

Correct. Since the relationship is significant, the draft was not fair because those with birthdays late in the year were more likely to have a high draft number (i.e., a draft number close to 1.0.)

Incorrect. Since the relationship is significant, the draft was not fair because those with birthdays late in the year were more likely to have a high draft number (i.e., a draft number close to 1.0.)

2

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