Statistical inference for the mean-4-t-test-unpaired

Statistical inference for the mean-4-t-test-unpaired -...

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Statistical Inference for the Mean: t-test omparison of sample means using unpaired samples: - We have samples for each of two conditions. Comparison of sample means using unpaired samples: We provide an answer for “ re the two sample means significantly different from Are the two sample means significantly different from each other, or could both plausibly come from the same population?” pp
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Statistical Inference for the Mean: t-test Comparison of sample means using unpaired samples: 0 , : 2 1 2 1 0 = = μ H test) tailed (two : 2 1 μ≠ a H test) tailed - (one 2 1 2 1 < > or
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omparison of sample means using unpaired samples: Sample 1 Comparison of sample means using unpaired samples: Sample 2 1 x Sample mean: 2 x Sample size: n 1 n 2 1 s Sample standard deviation: 2 s Combined estimate of variance: ) 1 ( ) 1 ( ) 1 ( s ) 1 ( s s 2 1 2 2 2 1 2 1 2 c + + = n n n n Pooled or combined variance Variance of the
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This note was uploaded on 02/13/2012 for the course MATH 2320 taught by Professor Glyn during the Fall '11 term at Minnesota.

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Statistical inference for the mean-4-t-test-unpaired -...

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