Stats question

[polksalet]

I just calced up some stuff in excel for a two-tailed t-test. The answer given is 0.891424120898814 I assume this means 0.891424120898814%, am I correct?

[MojoMan]

I just calced up some stuff in excel for a two-tailed t-test. The answer given is 0.891424120898814 I assume this means 0.891424120898814%, am I correct?

 

No. If you set up the thing right, it means that your alpha error is 89%, not 0.89%.

 

In most scientific disciplines, the critical p-value is < 0.05, meaning that there is a less than 5% chance that a difference observed is due to chance alone.

[polksalet]

yeah I screwed it up. my corect value is around .03

 

Pretest Postest

3 7 0.014597569

5 8

4 6 t-Test: Paired Two Sample for Means

6 7

5 8 Pretest Postest

5 9 Mean 6.25 7.333333333

4 6 Variance 2.97826087 2.579710145

5 6 Observations 24 24

3 7 Pearson Correlation -0.062743007

6 8 Hypothesized Mean Difference 0

7 8 df 23

8 7 t Stat -2.183878466

7 9 P(T<=t) one-tail 0.019713512

6 10 t Critical one-tail 1.713871517

7 9 P(T<=t) two-tail 0.039427023

8 9 t Critical two-tail 2.068657599

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