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Unformatted text preview: Variable 2 Mean 25.75 26 Variance 3.72 3.71 Observations 6 6 Pearson Correlation 0.97 Hypothesized Mean Difference df 5 t Stat-1.29 P(T<=t) one-tail 0.13 Ignore these values - for a one-tail test t Critical one-tail 2.02 Ignore these values - for a one-tail test P(T<=t) two-tail 0.26 t Critical two-tail 2.57 Verify: 2.57 x A x B = x B- x A sample standard deviation of : mean = S = OR, mathematically, = 0 (population mean of variable ) = Calculate the t-statistic and the p-value: t-statistic: [ t = ABS(( mean- ) * SQRT( n )/ S ) ] p-value: [ p = TDIST( t ,df,2) ] (Tools-Data Analysis-t-Test: Paired Two Sample for Means ) This is our t-statistic This is our p-value This is the critical value of t ( t /2 ) for = 0.05 (95% confidence) t /2 = [ t /2 = TINV(0.05,df) ]...
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- Spring '08