Chapter 4: Q. 4.127 (page 189)
If there is no linear relationship between and , the variables are linear -------
The variable are liner Uncorrelated
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6. What kind of plot is useful for deciding whether finding a regression line for a set of data points is reasonable?
In Exercise 4.11, we give linear equations. For each equation,
a. find the -intercept and slope.
b. determine whether the line slopes upward, slopes downward, or is horizontal, without graphing the equation.
c. use two points to graph the equation.
Given equation is,
For each exercise, determine the linear correlation coefficient using
a. Definition on page
b. Format on page ,
What is one purpose of the linear correlation coefficient?
Age and Price of Orions. In Table , we provided data on age and price for a sample of Orions between and years old. On the Weiss Stats site, we have given the ages and prices for a sample of Orions between and years old.
a. Obtain a scatterplot for the data.
b. Is it reasonable to find a regression line for the data? Explain your answer.
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