Ten women are studied to determine if oral contraceptives increase systolic blood pressure (mm Hg). Baseline blood pressure is measured before and then again several months after oral contraceptives are started. The following changes in systolic blood pressure are observed:

13 3 -1 9 7 7 6 4 -2 2

These data are represented by the variable BPCHG in the following output from PROC MEANS in SAS.

Analysis Variable : BPCHG

Mean Std Dev USS CSS T Prob>|T|

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4.8000000 4.5655716 418.0000000 187.6000000 3.3246511 0.0089

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What is the PRE?

What is the F statistic?

Therefore, at the 95% confidence level we [ Select ] ["Fail to Reject", "Reject"] the null hypothesis that model [ Select ] ["C", "A"] is a better predictor of blood pressure change than model [ Select ] ["C", "A"] with a p-value of [ Select ] ["0.05", "0.9", "0.0001", "0.23"] .