The percentage of hardwood concentration in raw pulp, the freeness, and the cooking time of the pulp are being investigated for their effects on the strength of paper. The data from a three-factor factorial experiment are shown in the following table.

(a) Analyze the data using the analysis of variance assuming that all factors are fixed. Use α = 0.05.

(b) Compute approximate P-values for the F-ratios in part (a).

(c) The residuals are found from Graphically analyze the residuals from this experiment.

STAT 2004 CHAPTER ONE: INTRODUCTION TO DATA POPULATIONS AND SAMPLES Population- Represents all people or things of interest. Sample- Observed/measured subset of a population. Data- Observations that form the backbone of a statistical investigation. Summary statistic- A single number that summarizes a large...