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Question
Read the following scenario and answer the questions below.After meeting with their instructor, Pablo and Johanna know that they need to change their experimental design. They contact a local puppy farm and arrange to do their study with 3-month-old litters of pups from four Irish setters, a total of 24 puppies, consisting of 12 females and 12 males.
In order to have two groups of puppies, one set to be the control group and one set to be the experimental group, Pablo and Johanna should ________.
A) put the 12 females in one group and the 12 males in the other group
B) flip a coin for each dog to see which group it will be in
C) randomly choose one dog for the control group and use the other 23 in the experimental group
D) put six males and six females in each group, with some from each litter in each group
E) put all the puppies from two of the litters in one group and all of the puppies from the other two litters in the other group
Answer
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