Wind turbine blade stress. Refer to the Wind Engineering (Jan. 2004) study of two types of timber-radiata pine and hoop pine-used in high-efficiency small wind turbine blades, presented in Exercise. Data on stress (y) and the natural logarithm of the number of blade cycles (x) for each type of timber were analyzed by means of simple linear regression. The results are as follows, with additional information on the coefficient of determination:
Interpret the value of r2 for each type of timber.
Answer to relevant QuestionsRefer to the Journal of Astrophysics & Astronomy (Mar./Jun. 2003) study of red shifts in quasi-stellar objects presented in Exercise. Recall that simple linear regression was used to model the magnitude (y) of a ...For a given x, a confidence interval for E (y) will always be wider than a prediction interval for y. Refer to the Journal of Experimental Psychology-Applied (June 2000) name-retrieval study, presented in Exercise. The data for the study are saved in the NAMEGAME2 file. a. Find a 99% confidence interval for the mean recall ...College protests of labor exploitation. Refer to the Journal of World-Systems Research (Winter 2004) study of student "sit-ins" for a "sweat-free campus" at universities, presented in Exercise. Recall that the SITIN file ...List the four assumptions about the random error e required for a multiple-regression analysis.
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