Question: The width of a 95 confidence interval for is
The width of a 95% confidence interval for μ is 10 units. If everything else stays the same, how wide would a 90% confidence interval be for μ?
Relevant QuestionsA telephone company wants to estimate the average length of long-distance calls during weekends. A random sample of 50 calls gives a mean x-bar = 14.5 minutes and standard deviation s = 5.6 minutes. Give a 95% confidence ...Pier 1 Imports is a nationwide retail outlet selling imported furniture and other home items. From time to time, the company surveys its regular customers by obtaining random samples based on customer zip codes. In one ...Explain how the postsampling confidence level is derived from a presampling probability. The data on the daily consumption of fuel by a delivery truck, in gallons, recorded during 25 randomly selected working days, are as follows: 9.7, 8.9, 9.7, 10.9, 10.3, 10.1, 10.7, 10.6, 10.4, 10.6, 11.6, 11.7, 9.7, 9.7, ...According to Fortune, solar power now accounts for only 1% of total energy produced. If this number was obtained based on a random sample of 8,000 electricity users, give a 95% confidence interval for the proportion of users ...
Post your question