30. Quality control Production managers on an assembly line must monitor the out

Question

30. Quality control Production managers on an assembly line must monitor the output to be sure that the level of defective products remains small. They periodically inspect a random sample of the items produced. If they find a significant in- crease in the proportion of items that must be rejected, they will halt the assembly process until the problem can be iden- tified and repaired. a) In this context, what is a Type I error? b) In this context, what is a Type II error? c) Which type of error would the factory owner consider more serious? d) Which type of error might customers consider more seri- ous?

Explanation / Answer

1) type I error - reject the null when it is true

Here it means we conclude that there is significant increase in proportion of items that must be rejected although when it is not true

B) type ii error - fail to reject the null when it is false

This means we don't conclude that there is increase in defective product even though it is true

C)

Type I error

D)

Type ii error

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