12. A Chemical Experiment 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

a. Use the data entry method for your calculator to calculate the preliminary sums of squares and crossproducts, 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.

Transcribed Image Text:

x=NI (ppb) y=Peak Current (mA) 19.1 .095 38.2 .174 57.3 .256 76.2 .348 95 .429 114 .500 131 .580 150 .651 170 .722