A researcher wants to dertermine whether or not a given drug has any effect on the scores of human subject performing a task of psychomotor coordination. The 9 subjects in group A(experimental group) received an oral administration of the drug prior to being tested. Ten subjects in group B(control group) received a placebo at the same time. The results are below Group A Group B 12 21 14 18 10 14 8 20 16 11 5 19 3 8 9 12 11. 13 15 Does the drug have an effect on psychomotor ability? Please explain what an effect size measures. Is this a small, medium or large effect?
A researcher wants to dertermine whether or not a given drug has any effect on the scores of human subject performing a task of psychomotor coordination. The 9 subjects in group A(experimental group) received an oral administration of the drug prior to being tested. Ten subjects in group B(control group) received a placebo at the same time. The results are below
Group A Group B
12 21
14 18
10 14
8 20
16 11
5 19
3 8
9 12
11. 13
15
Does the drug have an effect on psychomotor ability? Please explain what an effect size measures. Is this a small, medium or large effect?
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