5 2 Inference for paired data

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Комментарии
Автор

This video has been so helpful to me. Thank you for posting it.

emmanuellonga
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What is the t-value of -0.87 being used for here? And how do we work out that the area under each of the two tails is 0.193? Just not seeing how you get a p-value from the t-test, here.

annieregan
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Where is the t statistic of -0.87 used for?

tomvk
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The shaded graph has an error. The T value should be used to mark the boundary for p-value.

keylazy
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I don't understand how the distribution of the pairwise differences shows (in)dependence. If the writing test is a lot harder than the reading test, surely the average difference in scores would be significant (far from 0), but it doesn't show that the variables are dependent; a relatively high score on the reading test does not necessarily mean a high score on the writing test based on this information. Am I missing something?

florisr