Kara works as a dog trainer. She reads a new book that describes some unusual training methods, and she wants to test them out o
n the dogs she works with. She assigns each dog to one of two groups by picking a number out of a hat. Half the dogs are assigned to one group, and half the dogs are assigned to the other group. For a month, she trains one group using her old methods and the other group using the unusual methods. At the end of the month, Kara records that the dogs that were trained with her old methods obey her 80 percent of the time and those that were trained with the unique methods obey her 90 percent of the time. Kara concludes that the unique methods work better. Kara can best improve her experimental design by:_________ (A) using random assignment
(B) using random selection
(C) having someone else test the dogs
(D) using a computer program to pick the dogs' numbers
(E) trying a third training method as well
<span>Five-year-old rené is easily frustrated and loses control of her emotions. She often comes to school hungry or inappropriately dressed for the weather. You might reasonably suspect that rené's parents exhibit a(n) uninvolved parenting style.</span>
