In class #8 February 18th
(Use the mean of x, mean of y, standard deviation of x and standard deviation of y from In class #7 to do the following)
1. Using the data below find r, find b, find a, find y hat and draw scatterplot . ( round to two decimal places throughout)
x120187109103y25302624
2. Using the data below find r, find b, find a, find y hat and draw scatterplot. ( round to two decimal places throughout)
x10216y12842
3. Remove (10,12) from problem 2 and find x bar, y bar, standard deviation of x, standard deviation of y, find r, find b, find a, find y hat.
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Homework #8 February 18th
4.23 (Use the mean of x, mean of y, standard deviation of x and standard deviation of y from homework #7 to do the following)
find r, find b, find a, find y hat and draw scatterplot. ( round to two decimal places throughout).
4.26 (Use the mean of x, mean of y, standard deviation of x and standard deviation of y from homework #7 to do the following)
find r, find b, find a, find y hat and draw scatterplot . ( round to two decimal places throughout).
4.27 (Use the mean of x, mean of y, standard deviation of x and standard deviation of y from homework #7 to do the following)
find r, find b, find a, find y hat and draw scatterplot . ( round to two decimal places throughout).
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In class #9 February 23rd
(Use the mean of x, mean of y, standard deviation of x ,standard deviation of y, r, y hat and scatterplot from In class #7 and #8 to do the following)
1. Using the data below and the scatterplot, draw line when x = 100 and x =190 , show ( x bar, y bar) is on the line and find the residual when x = 109 and x = 103. ( round to two decimal places throughout)
x120187109103y25302624
2. Using the data below and the scatterplot , draw line when x = 0 and x =11 , show ( x bar, y bar) is on the line, find the residual of all x values, ( round to two decimal places throughout)
x10216y12842
3. Remove (10,12) and what you found from in class #8 on same scatterplot of problem 2 draw line when x = 0 and x =11 ( round to two decimal places throughout)
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Homework #9 February 23rd
4.23 (Use the mean of x, mean of y, standard deviation of x, standard deviation of y, r, scatterplot and y hat from homework #7 and #8 to do the following) On the scatterplot draw line when x = 40 and x = 60 , show ( x bar, y bar) is on the line and find the residual when x = 43.5. ( round to two decimal places throughout).
4.26 (Use the mean of x, mean of y, standard deviation of x, standard deviation of y, r, scatterplot and y hat from homework #7 and #8 to do the following) On the scatterplot draw line when x = 4 and x = 28 , show ( x bar, y bar) is on the line and find the residual when x = 8.5. ( round to two decimal places throughout).
4.27 (Use the mean of x, mean of y, standard deviation of x, standard deviation of y, r, scatterplot and y hat from homework #7 and #8 to do the following) On the scatterplot draw line when x = 1 and x = 5 , show ( x bar, y bar) is on the line and find the residual when x = 3. ( round to two decimal places throughout).
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