13-13. An experiment wasrun to determine whether four specific firing temperatur

Question

13-13. An experiment wasrun to determine whether four specific firing temperatures affectthe density of a certain type of brick. The experiment led to thefollowing data.







Temperature(°F) Density





100 21.8 21.9 21.7 21.6 21.7 21.5 21.8 125 21.7 21.4 21.5 21.5 — — — 150 21.9 21.8 21.8 21.6 21.5 — — 175 21.9 21.7 21.8 21.7 21.6 21.8 —







(a) Does the firing temperature affect the density ofthe bricks? Use = 0.05.







(b) Find the P-value for the F-statistic computed inpart (a).








(c) Analyze the residuals from the experiment.

13-13. An experiment wasrun to determine whether four specific firing temperatures affectthe density of a certain type of brick. The experiment led to thefollowing data.







Temperature(°F) Density





100 21.8 21.9 21.7 21.6 21.7 21.5 21.8 125 21.7 21.4 21.5 21.5 — — — 150 21.9 21.8 21.8 21.6 21.5 — — 175 21.9 21.7 21.8 21.7 21.6 21.8 —







(a) Does the firing temperature affect the density ofthe bricks? Use = 0.05.







(b) Find the P-value for the F-statistic computed inpart (a).








(c) Analyze the residuals from the experiment.

Explanation / Answer

One-way ANOVA: Densityversus Temperature

Source         DF     SS       MS     F      P
Temperature   3 0.1391 0.0464 2.62 0.083
Error           18 0.3191 0.0177
Total            21 0.4582

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