Essay
(A) Determine a 95% confidence interval for the proportion defective for the process today.
(B) Based on your answer to (A), is it still reasonable to think the overall proportion defective produced by today's process is actually the targeted 4%? Explain your reasoning.
(C) The confidence interval in (A) is based on the assumption of a large sample size. Is this sample size sufficiently large in this example? Explain how you arrived at your answer.
(D) How many units would have to be sampled to be 95% confident that you can estimate the fraction of defective parts within 2% (using the information from today's sample)?
Correct Answer:
Verified
(A)
n = 160, 
= 0.0875, (B) ...View Answer
Unlock this answer now
Get Access to more Verified Answers free of charge
Correct Answer:
Verified
n = 160,
= 0.0875, (B) ...View Answer
Unlock this answer now
Get Access to more Verified Answers free of charge
Q26: A company employs two shifts of workers.
Q28: If you decrease the confidence level, the
Q30: A 90% confidence interval estimate for a
Q30: After calculating the sample size needed to
Q32: (A) Compute <img src="https://d2lvgg3v3hfg70.cloudfront.net/TB1387/.jpg" alt="(A) Compute
Q33: If a random sample of size 250
Q34: The following values have been calculated using
Q35: From a sample of 500 items, 30
Q36: A market research consultant hired by Coke
Q54: If two samples contain the same number