INFERENCE FOR SINGLE POPULATION PROPORTION (CONFIDENCE INTERVAL) A random sample of 400 electronic components manufactured by a certain process is tested, and 30 are found to be defective. 11. i. Let p be the proportion of defective components. Find a 95% confidence interval for p. ii. How many components must be sampled so that the 95% confidence interval will specify the proportion of defective components to within +0.02? Source: Statistics for Engineers and Scientists, 3rd Edition, William, C. Navidi.

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INFERENCE FOR SINGLE POPULATION PROPORTION (CONFIDENCE INTERVAL)
11. A random sample of 400 electronic components manufactured by a certain process is tested,
and 30 are found to be defective.
i.
Let p be the proportion of defective components. Find a 95% confidence interval for p.
ii.
How many components must be sampled so that the 95% confidence interval will specify
the proportion of defective components to within ±0.02?
Source: Statistics for Engineers and Scientists, 3rd Edition, William, C. Navidi.
Transcribed Image Text:INFERENCE FOR SINGLE POPULATION PROPORTION (CONFIDENCE INTERVAL) 11. A random sample of 400 electronic components manufactured by a certain process is tested, and 30 are found to be defective. i. Let p be the proportion of defective components. Find a 95% confidence interval for p. ii. How many components must be sampled so that the 95% confidence interval will specify the proportion of defective components to within ±0.02? Source: Statistics for Engineers and Scientists, 3rd Edition, William, C. Navidi.
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