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Read the report below and make judgments on the quality of random sampling for the study, using the scheme outlined above:
Read the report below and make judgments on the quality of random sampling for the study, using the scheme outlined above: (a) very well met, (b) moderately well met, (c) somewhat well met, or (d) not very well met. Then briefly explain your reasoning for the four judgments you made.
Story 3: Cancer Study Re-indicts Red, Processed Meats Adding weight to earlier findings, a study of nearly 150,000 adults has found that eating too much red and processed meats raises a person's risk for colorectal cancer by up to 50%. Experts said that the study was large and carefully conducted and thus important in better defining the often murky relationship between cancer and people's eating habits. The study on meat and cancer, published January 12, 2005 in the prestigious, peer-reviewed Journal of the American Medical Association, was conducted by Ann Chao of the American Cancer Society and colleagues using data from 148,610 men and women aged 50 to 74 in 21 U.S. states. The scientists found that the group that ate the most red meat over the long term (defined as an average of at least three ounces daily for men and two ounces for women) had a 30% to 40% increased risk of rectal cancer or cancer of the distal colon (the portion of the colon nearest the rectum) compared to those whose consumption was lowest (less than 1.5 ounces daily for men, and one ounce for women). High consumption of processed meats was associated with a 50% increase in cancers of the distal colon. There were 1667 colorectal cancers during the course of the study.