In the previous problem, a randomized double-blind experiment was done to test the effectiveness of a drug designed to improve mem in Alzheimer's patient. Suppose the experiment was repeated and a 3rd group was added, no drug or placebo. Here's the results: Drug group: 8, 2, 3, 5 Placebo group: 3, -5, -2 Nothing group: -1, -3, -2 Null Hypothesis: No difference between any of the groups in the population Alternative Hypothesis: At least one of the groups is different in the population a. Fill out the chart below: First combine into one ordered list: -5, -3, -2, -2, -1, 2, 3, 3, 5, 8 Observed Rank Sum Expected Rank Sum Observed-Expected 32.5 Drug group Computer's answer now shown above. You are correct. Previous Tries Submit Answer Submit Answer Tries 0/2 Tries C Your receipt no. is 159-2744 0 11 Placebo Group Submit Answer Submit Answer Submit Answer Incorrect. Tries 1/3 Previous Tries Tries 0/2 Tries 0 Nothing group Submit Answer Submit Answer Submit Answer Tries 0/3 Tries 0/2 Tries 0 Total Submit Answer Submit Answer Submit Answer Tries 0/2 Tries 0/2 Tries C (obsR; -expR;)? 12 N(N+1) i=1 b. Find H = ni

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In the previous problem, a randomized double-blind experiment was done to test the effectiveness of a drug designed to improve memory
in Alzheimer's patient. Suppose the experiment was repeated and a 3rd group was added, no drug or placebo.
Here's the results: Drug group: 8, 2, 3, 5
Placebo group:
-5, -2
Nothing group: -1, -3, -2
Null Hypothesis: No difference between any of the groups in the population
Alternative Hypothesis: At least one of the groups is different in the population
a. Fill out the chart below: First combine into one ordered list: -5, -3, -2, -2, -1, 2, 3, 3, 5, 8
Observed Rank Sum
Expected Rank Sum
Observed-Expected
32.5
Computer's answer now shown above. You are
Drug group
Previous
Submit Answer
Submit Answer
correct.
Tries 0/2
Tries 0/2
Tries
Your receipt no. is 159-2744 O
11
Placebo
Group
Submit Answer
Submit Answer
Submit Answer
Incorrect. Tries 1/3 Previous Tries
Tries 0/2
Tries 0/2
Nothing
Submit Answer
Submit Answer
group
Submit Answer Tries 0/3
Tries 0/2
Tries 0/2
Total
Submit Answer
Submit Answer
Submit Answer
Tries 0/2
Tries 0/2
Tries 0/2
12
(obsR; -expR;)?
b. Find H =
N(N+1)
i=1
ni
Transcribed Image Text:In the previous problem, a randomized double-blind experiment was done to test the effectiveness of a drug designed to improve memory in Alzheimer's patient. Suppose the experiment was repeated and a 3rd group was added, no drug or placebo. Here's the results: Drug group: 8, 2, 3, 5 Placebo group: -5, -2 Nothing group: -1, -3, -2 Null Hypothesis: No difference between any of the groups in the population Alternative Hypothesis: At least one of the groups is different in the population a. Fill out the chart below: First combine into one ordered list: -5, -3, -2, -2, -1, 2, 3, 3, 5, 8 Observed Rank Sum Expected Rank Sum Observed-Expected 32.5 Computer's answer now shown above. You are Drug group Previous Submit Answer Submit Answer correct. Tries 0/2 Tries 0/2 Tries Your receipt no. is 159-2744 O 11 Placebo Group Submit Answer Submit Answer Submit Answer Incorrect. Tries 1/3 Previous Tries Tries 0/2 Tries 0/2 Nothing Submit Answer Submit Answer group Submit Answer Tries 0/3 Tries 0/2 Tries 0/2 Total Submit Answer Submit Answer Submit Answer Tries 0/2 Tries 0/2 Tries 0/2 12 (obsR; -expR;)? b. Find H = N(N+1) i=1 ni
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