The following are advertised sale prices of color televisions at Anderson's: Sale prices of televisions
Size Sales
(inches) Price ($)
9 147
20 197
27 297
31 447
35 1177
40 2177
60 2497
The researcher wants to determine if their appears to be a relationship between the variables
A. Decide which variable should be the independent variable and which should be the dependent variable.
B. Draw a scatter plot of the data.
C. Does it appear from inspection that there is a relationship between the variables? Why or why not?a. Yes, it appears that the television cost increases with television size. b. Yes, it appears that the television cost decreases with television size. c. No, there is no visible relationship between the variables.
D. Calculate the least squares line. Put the equation in the form of: ŷ = a + bx.
E. Find the correlation coefficient r.
F. Find the estimated sale price for a 33 inch television.
G. Does it appear that a line is the best way to fit the data? Why or why not?H. Are there any outliers in the above data?
I. What is the slope of the least squares (best-fit) line?