statistics Questions
Question Description
1) A person receive goods from 2 suppliers. Based on the following record can you conclude that occurrences of defects and the suppliers are independent? alpha=0.5
Type of Defects:
suppliers: A B C D E Total
1: 70 10 10 30 0 120
2: 10 10 20 20 20 80
Total 80 20 30 50 20 200
2)A person take a sample of 3 items of each of four different brands.Can you conclude that the mean values of all four brands are equal?
BRANDS
A B C D
20 25 24 23
19 23 20 20
21 21 22 20
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