Question: You wish to compute a 95 confidence interval for the
You wish to compute a 95% confidence interval for the population proportion. How large a sample should you draw to ensure that the sample proportion does not deviate from the population proportion by more than 0.06? No prior estimate for the population proportion is available.
Relevant QuestionsAn analyst would like to construct 95% confidence intervals for the mean stock returns in two industries. Industry A is a high-risk industry with a known population standard deviation of 20.6%, whereas Industry B is a ...A hair salon in Cambridge, Massachusetts, reports that on seven randomly selected weekdays, the number of customers who visited the salon were 40, 30, 28, 22, 36, 16, and 50. It can be assumed that weekday customer visits ...Students who graduated from college in 2010 owed an average of $25,250 in student loans (New York Times, November 2, 2011). An economist wants to determine if average debt has changed. She takes a sample of 40 recent ...A recent study examined “sidewalk rage” in an attempt to find insight into anger’s origins and offer suggestions for anger-management treatments (The Wall Street Journal, February 15, 2011). “Sidewalk ragers” tend ...Over a 10-year sample period, the mean return and the standard deviation of annual returns on a portfolio you are analyzing were 10% and 15%, respectively. You assume that returns are normally distributed. Construct the 95% ...
Post your question