t-test

# t-test - √n = 3.74/√6-1.53 T = mean x – mean meanx S...

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RT (s) 10.0 12.0 14.0 16.0 18.0 20.0 RT mean = 15.0 SS RT = 70 Is there a less than 5% chance or more than 5% chance that a sample has a mean of 12 S 2 RT = 70/5 = 14 S RT= = 3.74 Critical value = 2.015 (if the t value is more, then there is a less than 5% chance; if the t value is less, then there is a more than 5% chance) S meanRT = S RT
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Unformatted text preview: / √n = 3.74/√6-1.53 T = mean x – mean meanx / S mean x = 15-12/1.53 =3/1.53 =<2 Population has a mean of 12, alpha is .05, does the pill make people smarter? Dependent samples t-test RT1 RT2 ΔRT(RT2-RT1) 10 12 +2 14 17 +3 12 11-1 15 19 +4 18 19 +1 14 17 +3 Mean of ΔRT = 2.0 SS ΔRT = 16...
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## This note was uploaded on 10/04/2011 for the course PSYC 3990 taught by Professor Vandellen during the Spring '10 term at UGA.

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