Question: For problem 3.9 the sample variance of all responses = 42909.9, and the sample variance of the factor level (treatment) sample averages = 40811.7. Use

For problem 3.9 the sample variance of all responses = 42909.9, and the sample variance of the factor level (treatment) sample averages = 40811.7. Use these two sample variances to compute the sum of squares and means squares in the ANOVA table.

For problem 3.9 the sample variance of all

3.9 The tensile strength of Portland cement is being stud- red. Four different mixing techniques can be used econom- ically. A completely randomized experiment was conducted and the following data were collected: Mixing Technique Tensile Strength (lb/in) 1 2 3 4 3129 3200 2800 2600 3000 3300 2900 2700 2865 2975 2985 2600 2890 3150 3050 2765

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