Question 1111598: A sociologist is interested in the relation between x = number of job changes and y = annual salary (in thousands of dollars) for people living in the Nashville area. A random sample of 10 people employed in Nashville provided the following information.
x (number of job changes) 4 5 7 6 1 5 9 10 10 3
y (Salary in $1000) 35 37 34 32 32 38 43 37 40 33
Σx = 60, Σy = 361, Σx2 = 442, Σy2 = 13,149, and Σxy = 2233.
(b) Find xbar, ybar, b, and the equation of the least-squares line. (Round your answers to three decimal places.)
xbar =
y bar =
b bar =
y^ =
Plot the line on the scatter diagram of part
(a).
(c) Find the sample correlation coefficient r and the coefficient of determination r 2. (Round your answers to three decimal places.)
r =
r 2 =
What percentage of variation in y is explained by the least-squares model? (Round your answer to one decimal place.)
%
(d) If someone had x = 7 job changes, what does the least-squares line predict for y, the annual salary? (Round your answer to two decimal places.)
thousand dollars
Answer by ikleyn(52781)   (Show Source):
You can put this solution on YOUR website! .
So, you propose us simply work instead of you ?
BRILLIANT IDEA ! !
It deserves to be patented ! ( . . . under your name . . . )
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