Two large production runs have recently been completed— one on the night shift and one on the day shift. The shop foreman takes a random sample of 100 units from each run and tests them to estimate the difference in the proportion of units in the two runs that need to be reworked. The sample from the night shift produced eight such units and the sample from the day shift produced five such units. You build a confidence interval with a margin of error of .05. What level of confidence could you associate with this interval?
Answer to relevant QuestionsThe Costa Gravas Company wants to evaluate two different in store promotions for its latest entry into the consumer electronics market. You have matched retail stores that carry the product according to size and location. ...Consider a population consisting of four family members. Each member is asked whether she plans a career in business. Below are their responses: a. Using sampling without replacement, show all six possible samples of size ...World Review, the monthly newsmagazine, has recently changed its format (more holiday recipes and cartoons, less political commentary) and is interested in subscriber response. In a randomly selected sample of 200 ...Tri State Bank wants to determine the proportion of its customers who would take advantage of its proposed new interest bearing checking account, and plans to select a simple random sample to make an appropriate estimate. It ...You are planning to construct a 99% confidence interval estimate of a population proportion. You want your estimate to have a margin of error of .05. What is the minimum required sample size if the population proportion is ...
Post your question