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a Professor conducts an independent-measures study comparing two training programs. Training program #1 has a sample...

a Professor conducts an independent-measures study comparing two training programs. Training program #1 has a sample size n=16, mean M=23, and SS=104. Training program #2 has a sample size n=16, mean=20, and SS=160. What is your calculated test statistic?

t=2.15

t=2.93

t=1.96

t=2.86

Math   Statistics-And-Probability   
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Answer #1

s1^2 = 104/15 = 6.93

s2^2 = 160/15 = 10.67

The test statistic t = (M1 - M2)/sqrt(s1^2/n1 + s2^2/n2)

                            = (23 - 20)/sqrt(6.93/16 + 10.67/16)

                           = 2.86

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