Question

What if surveys were given to all visitors (as many as we could) on three days of the week, including one weekday asking if they would zip-line if it were available. The owner thinks that at least 40% would like to do that. If at least 40% say yes, then the resort will likely be profitable, the owner believes. In asking 1000 tourists over those three days, 320 indicated such an interest. If we assume a standard deviation of 75 tourists, can the owner's claim be supported at a 0.05 level of significance? (note: the mean under the null would be 400 while the sample mean would be 320.)

Answer 1