First construct the frequency distribution. Class Frequency, f 0-4 5-9 10-14 15-19 20-24 25-29 30+ Find an approximation for the sample mean. x= (Type an integer or decimal rounded to the nearest tenth as needed.) Find an approximation for the sample standard deviation. S= (Type an integer or decimal rounded to the nearest tenth as needed.) 0-4 hours (4 people) 5-9 hours (13 people) 10-14 hours (26 people) 15-19 hours (17 people) 20-24 hours (18 people) 25-29 hours (11 people) 30+ hours (5 people)