Question

A company is engaged in the packaging of a superior quality tea in jars of 250 g each. the company is of the view that as long as the jars contains 250 g of tea, the process is under control. based on a sample of 100 jars, a 90% confidence interval for the average weight of tea contained in the jars is found to be (251.5, 252.5). can we conclude that the process is under control at 10% significance level?

Answer 1

Based on the given confidence interval, we can conclude that the process is under control at a 10% significance level.

Step-by-step explanation:

In this question, the company has taken a sample of 100 tea jars and calculated a 90% confidence interval for the average weight of the tea. The confidence interval is (251.5, 252.5). To determine if the process is under control at a 10% significance level, we need to check if the true average weight falls within this interval. The process is considered under control if the true average weight is within the confidence interval. In this case, since the sample mean is within the confidence interval, we can conclude that the process is under control at a 10% significance level.