Statistics 101-106, Fall 1998
Pollard homework sheet 9
Due: Thursday 12 November
The following questions all relate to the data for the Leaning Tower of Pisa, on page 698 ofM&M.
Calculate the 95% confidence interval for the rate of change in the
lean, as described in M&M problem 10.8(c).
M&M Problem 10.9(a).
Fit the least squares line to the combined data for 1918 plus
1975--1987. Is there anything about the fit (r-squared, p-values,
patterns in the residuals, ...) that might give you cause for concern about fitting a straight line to these data?
Repeat the exercise from part (i), but using the fit from part
(iii). Is the resulting interval "better" than the interval from part (i)? Explain.
M&M Problem 10.10.
Each Section leader will assign extra problems.