Do humans have free will or are we hamstrung by greater forces (or even ourselves!)? Let's find out. Say aloud the colors you se
e for the below text (see PDF for colored text):
List 1: house goodbye paper cow clown eat ...
List 2: yellow green orange white purple black ...
If you're like most people, List 2 was harder. This is known as the Stroop effect, and it sug- gests that your own mind might block you from your goals in life.
You decide to test if the Stroop effect is present in non-colorblind college students, so you recruit a dozen random students at various colleges and have each person read both List 1 and 2 (you randomize who gets which one first) recording how many answers were correct. You get the below sumamrized results:
List 1 - List 2
Mean: List 1: 96.3, List 2: 84.1, List 1 - List 2: 12.2
SD: List 1: 1.4, List 2: 7.3, List 1 - List 2: ?
n: List 1: 12, List 2: 12, List 1 - List 2: 12
a. Explain why the ? cannot be found using the Var(X-Y) formula
b. You wish to conduct a HT exploring if the average score on List 1 is higher than that of List 2. What value should ? be if you want a P-value of 0.02?
List 1: house goodbye paper cow clown eat ...
List 2: yellow green orange white purple black ...
If you're like most people, List 2 was harder. This is known as the Stroop effect, and it sug- gests that your own mind might block you from your goals in life.
You decide to test if the Stroop effect is present in non-colorblind college students, so you recruit a dozen random students at various colleges and have each person read both List 1 and 2 (you randomize who gets which one first) recording how many answers were correct. You get the below sumamrized results:
List 1 - List 2
Mean: List 1: 96.3, List 2: 84.1, List 1 - List 2: 12.2
SD: List 1: 1.4, List 2: 7.3, List 1 - List 2: ?
n: List 1: 12, List 2: 12, List 1 - List 2: 12
a. Explain why the ? cannot be found using the Var(X-Y) formula
b. You wish to conduct a HT exploring if the average score on List 1 is higher than that of List 2. What value should ? be if you want a P-value of 0.02?
1 answer:
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