- Use the SAS output and the t-test formula to test the hypothesis that the true slope is equal to 0 (?=.05). Write down your null and alternative hypothesis, your test statistics, your rejection region or p-value, your conclusion and interpret your result.
- Construct a 99% confidence interval for the true slope. Interpret your result. When using SAS, you can use something like
- Use SAS to calculate and draw 95% confidence bands and prediction bands. When X=45, use the SAS output to get the estimation of the mean value of Y2, construct the 95% confidence interval for the mean of Y2 and the 95% prediction interval for a new individual with X=45. Interpret your intervals.
model sbp=quet/clb alpha=.01;(in proc reg)
ormodel sbp=quet/clparm alpha=.01;(in proc glm)
to get a 99% confidence level.
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