7. A survey of 35 graduates of a certain community college found that each student worked an average of 17.3 hours per week. The standard deviation of the population of students is known to be 4.1 hours. Please find a 95% Confidence Interval for the true mean number of hours students at this particular college work. 8. A poll found that 48 out of 298 adults said they had traveled outside the country. Estimate the true proportion of adults who have traveled outside the country with 92% confidence