What is the current median age at which American men first marry?

In plain English, what does the F-ratio tell us?

a. Out of two variables, which one is affecting the outcome more significantly b. Where on the normal distribution the difference between two means falls c. How large the differences between groups are when you take into account the differences within the individual groups d. How many standard deviations from the mean your sample is

Brief periods of sensory deprivation often produce

a. cataplectic images. b. the relaxation response. c. tryptophanic images. d. REM symbolizations.