Using a chemical procedure called differential pulse polarography, a chemist measured the peak current generated (in microamperes) when a solution containing a given amount of nickel (in parts per billion) is added to a buffer:2


a. Use the data entry method for your calculator to calculate the preliminary sums of squares and cross-products, Sxx, Syy, and Sxy.
b. Calculate the least-squares regression line.
c. Plot the points and the fitted line. Does the assumption of a linear relationship appear to be reasonable?
d. Use the regression line to predict the peak current generated when a solution containing 100 ppb of nickel is added to the buffer.
e. Construct the ANOVA table for the linear regression.