The annual maintenance bills of similar buildings in down town Nairobi were related to theirage with the following results. First row age A. Age (yrs) and second row M. Maintenance bills (000 shs)Age 155254052010304451525351030M3924115 105508667901401127018643126a) fit a regression line to this data (5 marks)b) find the 95 % confidence interval estimate of the maintenance cost of the building forage in years, assuming the data is homoscedastic (5 marks)c) Test the significance of the regression coefficients b and a at the .05 significance level (5 marks)

to plot points   for x just start at the origin (middle) and go to the left however many times it say(if the number is a positive) if the number is a negative then go right however many times it says if it is 0 go nowhere

now keep you pencil there and go up however many times it says on y(if it is positive) if it is negative then go down however many times it says. if it says 0 go nowhere.

you have just plotted a point! now when you finish plotting all of them connect them with a ruler

plot each point as (-3, 7), (0,4), (3,1), (8,-4)   in the parenthesis on the left of the comma is x and the right is y.

yeah i know the problem you need. i am taking it right now. the answer is step 3

~mickey