The most addictive and dangerous stimulant in use today is ________

If a study is found to have statistical significance, what is true of that study's practical significance?

a. The statistical and practical significance of a study two ways of reporting the same thing. b. The study cannot be practically significant. c. The study may or may not be practically significant. d. The study must be practically significant.

A rigorous study conducted by the Swedish army showed that young men who were heavy cannabis users by age 18 were __________ times more likely to develop schizophrenia than those who weren't.

A. 3 B. 4.5 C. 6 D. 10.3