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A manufacturing process produces 7.2% defective items. What is the probability that in a sample of...

A manufacturing process produces 7.2% defective items. What is the probability that in a sample of 56 items:

a. 10% or more will be defective? (Round the z-value to 2 decimal places and the final answer to 4 decimal places.)

Probability            

b. less than 1% will be defective? (Round the z-value to 2 decimal places and the final answer to 4 decimal places.)

Probability            

c. more than 10% or less than 1% will be defective? (Round the z-value to 2 decimal places and the final answer to 4 decimal places.)

Probability            

Math   Statistics-And-Probability   
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Answer #1

Use normal approximation. The proportion is . The standard deviation of the proportion is

a) The probability,

b) The probability,

c) The probability, (use the results of previous parts)

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