1. A community health status survey obtained the following demographic information from the respondents: Age Frequency 18-29 297 30-45 661 46-64 634 65- 369 Compute the relative frequency and cumulative relative frequency of the age groups. Also, estimate the average age of the sample of respondents. What assumptions do you have to make to do this? ANSWER: Age Frequency (f) Relative Cumulative Frequency Relative Frequency 18 to 29 297 297 = 0.15 0.15 1961 30 to 45 661 661 = 0.34 0.15+0.34=0.49 1961 46 to 64 634 634 = 0.32 0.49+0.32=0.81 1961 65+ 369 369 = 0.19 0.81+0.19=1.00 1961 Total 1961 1.00 Class Interval Frequency (f) Mid Value (x) fx 18-30 297 24.0 7128 30-46 661 38.0 25118 46-65 634 55.5 35187 65-90 369 77.5 28597.5 Total 1961 96030.5 50, the average age of the sample of respondents in a community health status survey is: Mean (x) = 96030.5 = 48.97 = 49.0 years. 1961