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Chapter 4: Q. 4.37 (page 173)
Regarding the two variables under consideration in a regression analysis,
a. What is the dependent variable called?
b. What is the independent variable called?
a. y is the dependent variable.
b. x is the independent variable.
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11. Using a regression equation to make predictions for values of the predictor variable outside the range of the observed values of the predictor variable is called ________
A measure of the amount of variation in the observed values of the response variable not explained by the regression is the----. The mathematical abbreviation for it is----.
A value ofcloses to -----indicates that the regression equation is is extremely useful for making predictions.
Determine the linear correlation coefficient by formula and definition.
In the article "Comparison of Fiber Counting by TV Screen and Eyepieces of Phase Contrast Microscopy" (Amer. icon Industrial Hyeiene Asseciution Journal, Vol. 63, Pp. 756-761), 1. Moa et al. reported on determining fiber density by two different methods. Twenty samples of varying fiber density were each counted by 10 viewers by means of an eyepiece method and a television screen method to determine the relationship between the counts done by each method. The results, in fibers per square millimeter, are presented on the Weiss Stats site.
(a). Decide whether use of the linear correlation coefficient as a descriptive measure for the data is
appropriate, If so, then also parts and.
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