T-test review - T-Test Review PSY 201(Spring Area Lateral Hypothalamus X 10 18 16 22 14 Neutral Y 6 8 11 14 10 25 17 20 10 22 12 18 14 21 13 Left

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T-Test Review PSY 201 (Spring) 4/13/08
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Lateral Hypothalamus X Neutral Y Area 10 18 16 22 14 25 17 22 12 21 6 8 11 14 10 20 10 18 14 13
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Left side of the room: Perform an independent t-test on the data Right side of the room: Perform a dependent samples t-test Half will use the definitional formula Half will use the difference formula ( 29 ( 29 Y X Y X hyp Y X s rs s s Y X 2 2 2 - + - - - = m m D hyp D s D t ) ( μ - =
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Lateral Hypothalamus X Neutral Y Area 10 18 16 22 14 25 17 22 12 21 6 8 11 14 10 20 10 18 14 13 X - X ( ) Y - Y ( ) -7.7 .3 -1.7 4.3 -3.7 7.3 -.7 4.3 -5.7 3.3 -6.4 -4.4 -1.4 1.6 -2.4 7.6 -2.4 5.6 1.6 .6 S X = 4.58 S Y = 4.10
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Make alternative hypotheses nondirectional 2200 α = .01
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Formulas D hyp D s D t ) ( μ - = ( 29 ( 29 Y X hyp Y X s Y X t - - - - = m m n s s D D = s D = D - D ( ) 2 n - 1 ( 29 ( 29 Y X Y X hyp Y X s rs s s Y X 2 2 2 - + - - - = m m t ( 29 ( 29 Y X S nS Y Y X X r X - - = g = X - Y s p
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Independent t-test N = 20 t = (17.7 - 12.4) - 0 2.05 = 2.59 s X - Y = 23.34 10
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This note was uploaded on 04/17/2008 for the course PSY 201 taught by Professor Arthur during the Spring '08 term at Purdue University-West Lafayette.

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T-test review - T-Test Review PSY 201(Spring Area Lateral Hypothalamus X 10 18 16 22 14 Neutral Y 6 8 11 14 10 25 17 20 10 22 12 18 14 21 13 Left

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