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A microchip manufacturer selects 400 chips at random from a large production run for quality testing. Let phat be the proportion of chips in this sample that are found to be defective. If 3 percent of all the chips in the production run are defective, what is the approximate probability that the sample proportion of defective chips will be between .01 and .04? (Hint: See example 13.11 on page 360 in the text book.)
Check to see if the normality approximation will hold.
What is np =? Blank 1 ( whole number will work)
What is n(1-p) =? Blank 2 (whole number will work)
What is mu phat =? Blank 3 (five decimals)
What is sigma phat =? Blank 4 (five decimals)
What is the probability that the phat will be between .01 and .04 Blank 5 (five decimals)
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