Question 6 3 pts magine a researcher wanted to assess people\'s fear of dogs as

Question

Question 6 3 pts magine a researcher wanted to assess people's fear of dogs as a function of the size of the dog. He assessed fear among people who indicated they were afraid of dogs, using a 30-point scale from O (no fear) to 30 (extreme fear). The researcher exposed each participant to three different dogs, a small dog weighing 20 pounds, a medium-sized dog weighing 55 pounds, and a large dog weighing 110 pounds, assessing fear level after each exposure. Here are some hypothetical data from this study: Small Medium Large 4 -44N-12 n= N 12 x 105 EXT 204 ??, 2785 x-35x-64 Ex, 395 ??, 1042 ExT2+4222 Fill in the following table. (2 decimals required for all SS and MS values.) Source SS Between Treatments Within Treatment df MS Tota

Explanation / Answer

c ni x?i S2i ni*(Xi-Xgrand)2 (ni-1)*S2i small 4 8.750 29.583 272.250 88.75 medium 4 16.000 6.000 4.000 18.00 large 4 26.250 9.583 342.250 28.75 grand mean= 17.000 618.500 135.50 SSTr SSE Source of variation SS df MS F between 618.500 2 309.25 20.54 within 135.500 9 15.06 total 754.000 11

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