A researcher obtains a random sample of n = 10 patients diagnosed with ADHD and

Question

A researcher obtains a random sample of n = 10 patients diagnosed with ADHD and rates each person’s change in symptoms from before starting an experimental treatment to after completing treatment using an ordinal data method. An increase in ranking would reflect less ADHD symptoms. Using the data below, determine if the treatment affected the ADHD patients. Use a Wilcoxon T test.

Player

Change in Ranking

1

+8

2

- 3

3

+4

4

+5

5

-2

6

+4

7

+6

8

+9

9

+7

10

-1

Player

Change in Ranking

1

+8

2

- 3

3

+4

4

+5

5

-2

6

+4

7

+6

8

+9

9

+7

10

-1

Explanation / Answer

We take the positive sum above and negative sum of the change in ranks

Positive sum = 43

negative sum = -6

Lets say the Critical value is C

if C>6 then we say that we have sufficient evidence to suggest that there is a difference after the treatment is done

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