Michael has difficulty keeping still, is unable to concentrate on schoolwork, and often acts without thinking. Michael is showing signs of

If you were to explain to your classmate why using the sum of squares is not an appropriate measure of each source's variability in a multiple-group design, you would say,

a) "Each sum of squares is based upon a different number of deviations from the mean b) "The source table does not provide the sum of squares." c) "The ratio of between- and within-groups variability based upon the sum of squares would result in a large F value." d) "There is only one source of variation that contributes to within-group variability."

Emily's child has facial deformities and displays some mental impairment. If these defects could be traced to a teratogen used by Emily when she was pregnant, what was she most likely abusing?

A. Nicotine B. Cocaine C. Marijuana D. Alcohol