The following data are the percents of foreign additives measured by 5 analysts for 3 similar brands of strawberry jam, A, B, and C:
Analyst 1
Analyst 2
Analyst 3
Analyst 4
Analyst 5
B: 2.7
C: 7.5
B: 2.8
A: 1.7
C: 8.1
C: 3.6
A: 1.6
A: 2.7
B: 1.9
A: 2.0
A: 3.8
B: 5.2
C: 6.4
C: 2.6
B: 4.8
Perform a randomized complete block analysis of variance to test the hypothesis, at the 0.05 level of significance, that the percent of foreign additives is the same for all 3 brands of jam. Which brand of jam appears to have fewer additives?
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