Chapter 4: Q. 3 (page 191)
Theintercept of a line has no effect on the steepness of the line.
Short Answer
The intercept of a line has no effect on the steepness of the line". The given statement is true.
Chapter 4: Q. 3 (page 191)
Theintercept of a line has no effect on the steepness of the line.
The intercept of a line has no effect on the steepness of the line". The given statement is true.
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Get started for freeIn Problems 3-5, answer true or false to each statement. Explain your answers.
4. A horizontal line has no slope.
If y tends to decrease linearly as x increases. the variables are -------linearly correlated.
The data for shell thickness and concentration of PCBs for Anacapa pelican eggs from Exerciseare on the Weiss Stats site.
(a) Decide whether finding a regression line for the data is reasonable. If so, then also do puts .
A Knight-Ridder News Service article in an issue of the Wichita Eagle discussed a study on the relationship between country music and suicide. The results of the study. coauthored by S. Stack and J. Gundlach, appeared as the paper "The Effect of Country Music on Suicide" (Social Forces, Vol. 71, Issue 1. Pp. 211-218). According to the article, " analysis of 49 metropolitan areas shows that the greater the airtime devoted to country music. the greater the white suicide rate," (Suicide rates in the black population were found to be uncorrelated with the amount of country music airtime.)
(a). Use the terminology introduced in this section to describe the statement quoted above.
(b). One of the conclusions stated in the journal article was that country music "nurtures a suicidal mood" by dwelling on marital status and alienation from work. Is this conclusion warranted solely on the basis of the positive correlation found between airtime devoted to country music and white suicide rate? Explain your answer.
Determine the linear correlation coefficient by formula and definition.
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