Under what circumstances will the main effects in a factorial study not provide an accurate description of the results?

Based on your observations of porto alegre and houston, what would you conclude about the longest and shortest days for the two cities on opposite sides of the equator

Facial shaving brushes are either bulb-shaped or fan-shaped. an experiment is to be conducted to determine whether the lather thickness is the same for both types of shaving brushes. in previous studies, it was determined that shaving brush size (small, medium, large) is associated with lather thickness, but shaving brush type (wolf whiskers, maggard razors, frank shaving, and so on) is not associated with lather thickness. how could the experiment best be conducted? by blocking on shaving brush size by blocking on shaving brush type by blocking on shaving brush shape by blocking on lather thickness without blocking

Will mark brainliest ! the two parking space configurations you'll see in garages and parking lots are a. low-angle and high-angle spaces b. high-angle and boxed spaces c. straight-in spaces and angle spaces d. left-angle spaces and herringbone spaces