"ecstasy" was a popular drug in the 1990s. it produced a sense of euphoria derisively called the "yuppie high." one investigator made a careful sample survey to estimate the prevalence of drug use at stanford university. two assistants were stationed on the main campus plaza and instructed to interview all students who passed through at specified times. as it turned out, 39% of 369 students interviewed said they had used ecstasy at least once. does the investigator’s procedure give a probability sample of stanford students? answer yes or no, and explain.

Which of the following is a law making body that governs england

According to the belmont report, the moral requirement that there be fair outcomes in the selection of research subjects, expresses the principle of: a. beneficence.b. respect for persons.c. justice.

Which of the following selections is least useful for supporting the claim that states intentionally built unequal school systems? question 1 options: the supreme court ruling in plessy v. ferguson (1896) wrote into law that america had two separate societies: one black and one white. it was very clear by the mid-1900s that southern states had expertly built separate educational systems. these schools, however, were never equal. states with laws keeping schools segregated never gave equal amounts of money to their black and white schools. ten years after brown, fewer than 10 percent of southern public schools had integrated. some areas did not comply at all.