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the supervisor at the Jelly Belly Factory in Fairfield finds that out of 250 randomly selected...

the supervisor at the Jelly Belly Factory in Fairfield finds that out of 250 randomly selected bags of popcorn-flavored Jelly Bellys, 30 are underweight. Find the point estimate, p-hat for the proportion, p, of all bags that are underweight and the 90% confidence interval for p

Math   Statistics-And-Probability   
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Answer #1

(a)

Point estimate is given by:

(b)

= 0.10

From Table, critical values of Z= 1.645

Confidence Interval:

0.12 (1.645 X 0.0206)

= 0.12 0.0338

= ( 0.0862 ,0.1538)

Confidence Interval:

0.0862 < 0.1538

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