The following data represent the means for each treatment co…

The following data represent the means for each treatment condition in a two factor experiment.  Note that one mean is not given. What value for the missing mean would result in no main effect for factor B?                 B1         B2       A1    20    10     A2    40     ?

A researcher collects data for participants of ages 8 to 18…

A researcher collects data for participants of ages 8 to 18 years old and creates a regression equation of y = 0.25x + 2, where x = age in years and y = the average number of hours spent viewing technology screens. According to this equation, what is the average number of hours a 30-year-old spends viewing screens?