stat425fall10prcexam1-sln - 1. The Berkeley Guidance Study...

Info iconThis preview shows pages 1–4. Sign up to view the full content.

View Full Document Right Arrow Icon
1. The Berkeley Guidance Study enrolled children born in Berkeley, California, between January 1928 and June 1929, and then measured them periodically until age eighteen (Tuddenham and Snyder, 1954, Calif. Publ. Child Dev. ). From this study, a researcher complied a dataset, which gives height in centimeters and weight in kilograms for a sample of n = 10 18-year-old girls. Interest is in predicting weight ( y ) from height (x). Summary statistics are given below 165.52, 59.47, 472.076, 731.961, 274.786 x y SXX SYY SXY = = = = = (1) Based on the information given above, compute estimates of the slope and the intercept for the least squares regression of weight on height. (Intercept) Ht -36.8759 0.5821 (2) Obtain the estimate of 2 σ 71.50394
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
(3) Compute the t-statistic for the hypotheses that 1 0 β = , and provide the corresponding degrees of freedom. -0.572 with 8 df
Background image of page 2
2. Below are scatter plots of four hypothetical datasets, labeled (a)-(d). Each plot includes the least squares line for the regression of y on x.
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 4
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 8

stat425fall10prcexam1-sln - 1. The Berkeley Guidance Study...

This preview shows document pages 1 - 4. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online