Statistics II20815 marksNumerical: confidence interval proportionEstimation
Define confidence level in estimation. A quality control inspector collected a random sample of 400 tubes of toothpaste from the production line and found that 20 of the tubes had leaks from the tail end. Construct 96% confidence interval for the percentage of all the toothpaste tubes that had leaka
Define confidence level in estimation. A quality control inspector collected a random sample of 400 tubes of toothpaste from the production line and found that 20 of the tubes had leaks from the tail end. Construct 96% confidence interval for the percentage of all the toothpaste tubes that had leakage and interpret the result. [5]
The confidence level $(1-\alpha)$ is the probability that the interval estimate constructed from sample data will contain the true population parameter. A 96% confidence level means that if repeated random samples were taken and an interval built from each, about 96% of those intervals would encl...