Monday, July 19, 2010

Tricky Statistics

I had a brain disconnect today on my biostats midterm. Thankfully, there was 3 hrs time, and I was able to catch my mistakes.

1) If I just did a F test and found that the variances were equal, why oh why did I perform the t test for two independent samples with unequal variances?

2) If the t is within the critical values, the p value is going to be LARGER than alpha, not smaller. I spent a half hour figuring this one out. Finally figured it out, and failed to reject H naught.

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