Use the same data provided in number 18 but change the sample size to 100 and the confidence level to 95% and now find the confidence interval.
In a study you just read about in a management journal, it stated that out of 2250 people surveyed, 1755 stated that they believe they work too many hours. Using the 90% confidence level and assuming you do not know the population size, solve for the interval within which the population proportion likely falls.