The accompanying data was extracted from the article Effects of Cold and Warm Temperatures on Springback of
Question:
a. What proportion of observed variation in strength can be attributed to the model relationship?
b. Carry out a test of hypotheses at significance level .05 to decide if the quadratic predictor provides useful information over and above that provided by the linear predictor.
c. For a strength value of 100, yÌ = 134.07, sYÌ = 2.38. Estimate true average strength when temperature is 100, in a way that conveys information about precision and reliability.
d. Use the information in (c) to predict strength for a single observation to be made when temperature is 100, and do so in a way that conveys information about precision and reliability. Then compare this prediction to the estimate obtained in (c).
Step by Step Answer:
Probability And Statistics For Engineering And The Sciences
ISBN: 9781305251809
9th Edition
Authors: Jay L. Devore