Independent t-test - Explained Simply (Part 5)

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(Part 5) I describe how to calculate and interpret an independent samples t-test so that anyone can understand it.
  1. how2stats
  2. Student's T-test
  3. independent
  4. t-test
  5. compare means
  6. statistics
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Комментарии
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Wow, you explained this a lot better than my professor

deborahcheung
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Is the alpha value the same as the p value?

yusun
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hi... on the previous presentation (part 4), you got a mean of 4.29 for thesmokers... but why did you use 4.30 in this video and you said it is 4.33? it's at about 1.07 of this video... I'm confused. cheers

reviewqueen
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Great videos! Thank you for the step-by-step guides.

The only question that's bugging me now is why didn't you use the pooled estimate of population variance for your Friday night's formula, but just use the unbiased estimate of population variances? Thanks.

jinjing
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The squared deviations are divided by n-1 to get S^2 then again by n when in the denominator of t, why

vinsavi
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why did you subtract 1 from the sample size when calculating the sample variance?

jaylaharris
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Hello, when you say you have calculated the variance do you actually mean the standard deviation or have i got confused? thanks.

EscapeFromDaSystem