HLTH 485 ACTIVITY 1 INSTRUCTIONS Use the answer sheet at the end of the document to submit your answers to the questions below. 1. Consider this data set showing 9 participants' total cholesterol levels. 185 225 240 196 175 180 194 147 223 a. Compute the sample mean. b. Compute the sample standard deviation. c. Compute the median. d. Compute the Interquartile range (Hint: find the first and third quartiles, then find the difference. Remember: third quartile - first quartile). 2. Refer to the table below to compute the Age Specific rates. Whites Years Cases < 50 50-54 55-59 60-64 65-69 70+ 3,616 1,913 2,094 2,043 1,788 4,940 Population 7,420,076 830,549 736,737 567,178 400,785 1,210,138 Blacks Age Specific Cases Population 1,415 690 692 577 443 1,026 3,344,874 293,626 244,829 162,834 111,761 266,941 Other Age Specific Cases Population 662 286 293 194 2,066 429 1,586,388 148,548 131,258 89,008 69,068 177,188 Age Specific 3. A prospective cohort study showed that 200 new cases of disease X occurred in 2,000 persons-year. a. Calculate the person-time incidence rate b. Calculate 95% confidence interval Page 1 of 3 HLTH 485 4. Go to the U.S. Census Bureau's site on international demographic data: http://www.census.gov/ipc/www/idb/pyramids.html. Once you are on the site, select the \"Data\" tab and then \"International Data Base.\" Select Afghanistan and the United States, and under \"Select Report\" scroll down to \"Population Pyramid.\" Then, submit your job. How does the age distribution compare between these two populations? Answer must be at least 4 complete sentences. Submit your Activity 1 by 11:59 p.m. (ET) on Monday of Module/Week 3. Page 2 of 3 Whites Years 1. < 50 a) 50-54 55-59 b) 60-64 c) 65-69 70+ d) Blacks 3,616 7,420,076 4.87 1,415 3,344,874 Age Specific 4.23 1961,913 830,549 0.0023 690 293,626 2,094 736,737 0.0028 692 244,829 2,043 567,178 0.0036 577 400,785 0.0045 1,210,138 0.0041 Cases 29 1941,788 11 4,940 Population HLTH 485 Other 662 1,586,388 Age Specific 4.17 0.0023 286 148,548 0.0019 0.0028 293 131,258 0.0022 162,834 0.0035 194 89,008 0.0022 443 111,761 0.0040 2,066 69,068 0.0299 1,026 266,941 0.0038 429 177,188 0.0024 Age Specific Cases Population Cases Population 2. Fill out the table by computing the Age Specific rates. 3. a) b) 4 Page 3 of 3