This preview shows pages 1–2. Sign up to view the full content.
This preview has intentionally blurred sections. Sign up to view the full version.
View Full Document
Unformatted text preview: ) y = 252. a) Test H : = 0 vs. H a : > 0 at the = 0.01 level of significance. What can you say about the pvalue of this test? b) Does it follow from part (a) that storks do bring babies? Explain . c) Test H : = 0.50 vs. H a : > 0.50 at the = 0.05 level of significance. What can you say about the pvalue of this test? d) Construct a 95% confidence interval for . 100 ( 1 ) % confidence interval for : & & ++1 1 , 1 1 b b a a e e e e , where 3 2 1 1 2 ln+ = n r r a z , 3 2 1 1 2 ln++ = n r r b z . 2.5 Using the prostate data, plot lpsa against lcavol . Fit the regressions of lpsa on lcavol and lcavol on lpsa . Display both regression lines on the plot. At what point do the two lines intersect? Hint 1: If x = m y + b , then y = m 1 x m b . Hint 2: abline( yintercept , slope ) 3.5 Find a formula relating R 2 and the Ftest for the regression....
View Full
Document
 Spring '08
 STEPANOV
 Statistics

Click to edit the document details