A manufacturing assembly line does a quality check by sampling 200 of its products. It finds...

A manufacturing assembly line does a quality check by sampling 200 of its products. It finds that 80 of the parts are defective.

What are n, x and p’ ? (Round p’ to 2 decimal places)

Define the random variable of p’ using the notation: Round mean and standard deviation to 2 decimal places.

Create a 95% confidence interval for the proportion of defective parts for the company. Also find the width of the CI. (Round upper and lower bounds to 3 decimal places).

In a complete sentence, explain what this particular confidence interval means.

Find the 90% confidence interval if sample size was 150 instead of 200 products and 60 were found to be defective. And find the width.

Why is the 90% CI wider than the 95% CI?

please list out details

Expert Solution

orchestra answered 2 years ago

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