Math 221 week 5 homework - Study guides, Class notes & Summaries

1. Question:From a random sample of 58 businesses, it is found that the mean time the owner spends on administrative issues each week is 20.53 with a population standard deviation of 3.23. What is the 95% confidence interval for the amount of time spent on administrative issues? 2. Question:If a confidence interval is given from 43.83 up to 61.97 and the mean is known to be 52.90, what is the margin of error? 3. Question:If a car manufacturer wanted lug nuts that fit nearly all the time, what ...