Question: Many research studies such as the one discussed in Exercise
Many research studies such as the one discussed in Exercise 4.82 focus on a link between marijuana use and psychotic disorders such as schizophrenia. Studies have found that people with schizophrenia are twice as likely to smoke marijuana as those without the disorder. Data also suggest that individuals who smoke marijuana are twice as likely to develop schizophrenia as those who do not use the drug. Contributing to the apparent relationship, a comprehensive review done in 2007 of the existing research reported that individuals who merely try marijuana increase their risk of developing schizophrenia by 40%. Meanwhile, the percentage of the population who has tried marijuana has increased dramatically in the United States over the past 50 years, whereas the percentage of the population affected by schizophrenia has remained constant at about 1%. What might explain this puzzling result?
Answer to relevant QuestionsExcessive cumulative exposure to ovarian hormones is believed to cause breast cancer. A study (New England J. Medic. 2003; 348: 2313–2322) used information from 1811 pairs of female twins, one or both of whom had breast ...An interviewer stands at a street corner and conducts interviews until obtaining a quota in various groups representing the relative sizes of the groups in the population. For instance, the quota might be 50 factory workers, ...Use the Simulating the Probability of Head with a Fair Coin applet on the text CD or other software to illustrate the long-run definition of probability by simulating short-term and long-term results of flipping a balanced ...An eyewitness to the crime says that the person who committed it was male, between 15 and 20 years old, Hispanic, and drove a blue Honda. The prosecutor points out that a proportion of only 0.001 people living in that city ...Part of a student opinion poll at a university asks students what they think of the quality of the existing student union building on the campus. The possible responses were great, good, fair, and poor. Another part of the ...
Post your question