statistics problems 2 questions

FratBro23
Category:
Statistics
Price: $5 USD

Question description

1) "Z"  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)"Z" 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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