12.5 Test 2 Computer Practice

12.5 Test 2 Computer Practice - As a manager of a sales...

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Unformatted text preview: As a manager of a sales team, you are interested in different training methods. To see if there are differences in avg monthly sales among people who were trained in different ways, you design an experiment and collect the monthly sales of several employees. Sales are given in thousands of dollars. Use alpha = 0.05. yrs experience video 1 2 3 4 5 6 7 8 3.5 2.9 3.8 4 3.6 4.1 4.4 4.5 training method mentor class 3.8 4 4.2 4 4.4 4.4 4.8 4.7 3.5 3.3 4 4.2 4.2 4.3 4.8 4.6 Answer: Anova: Two-­‐Factor Without Replic SUMMARY 1 2 3 4 5 6 7 8 video mentor class ANOVA Source of Variation Rows Columns Error Total here are differences in ment and collect the Anova: Two-­‐Factor Without Replication Count 3 3 3 3 3 3 3 3 Sum 10.8 10.2 12 12.2 12.2 12.8 14 13.8 8 8 8 30.8 34.3 32.9 SS 4.0466667 0.7758333 0.5308333 5.3533333 df Average 3.6 3.4 4 4.0666667 4.0666667 4.2666667 4.6666667 4.6 Variance 0.03 0.31 0.04 0.0133333 0.1733333 0.0233333 0.0533333 0.01 3.85 0.2714286 4.2875 0.1241071 4.1125 0.2583929 MS F P-­‐value F crit 7 0.5780952 15.246468 1.461E-­‐05 2.7641993 2 0.3879167 10.230769 0.0018262 3.7388918 14 0.0379167 23 Ho: mu1 = mu2 = mu3 Ha: at least one mu differs F = 10.231 pvalue = .002 There is enough evidence to conclude ther in avg monthly sales among people who w different ways. one mu differs ough evidence to conclude there are differences hly sales among people who were trained in ...
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