# Question

Samples of emissions from three suppliers are classified for conformance to air-quality specifications. The results from 100 samples are summarized as follows:

Conforms

Yes no

1 22 8

Supplier 2 25 5

3 30 10

Let A denote the event that a sample is from supplier 1, and let B denote the event that a sample conforms to specifications.

(a) Are events A and B independent?

(b) Determine

Conforms

Yes no

1 22 8

Supplier 2 25 5

3 30 10

Let A denote the event that a sample is from supplier 1, and let B denote the event that a sample conforms to specifications.

(a) Are events A and B independent?

(b) Determine

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