Asurvey of physicians in 1979 found that some doctors give a placebo to patients who complain of pain for which the physician can find no cause. if the patients' pain improves, these doctors conclude that it had no physical basis. the medical researchers who conducted the survey claimed that these doctors do not understand the placebo effect. why?

There are two major tests of readiness for college: the act and the sat. act scores are reported on a scale from 1 to 36. the distribution of act scores in recent years has been roughly normal with mean µ = 20.9 and standard deviation s = 4.8. sat scores are reported on a scale from 400 to 1600. sat scores have been roughly normal with mean µ = 1026 and standard deviation s = 209. reports on a student's act or sat usually give the percentile as well as the actual score. the percentile is just the cumulative proportion stated as a percent: the percent of all scores that were lower than this one. tanya scores 1260 on the sat. what is her percentile (± 1)?