Question
In: Statistics and Probability
You are considering testing a new drug that is supposed to facilitate learning in mentally retarded...
You are considering testing a new drug that is supposed to facilitate learning in mentally retarded children. Based on preliminary research, you have some idea about the size of the drug's effect. Because of your work schedule you can either do the test with 15 subjects or with 20. You would like to only run 15 subjects, but if running 20 will make power at least 20% higher, you will run 20 subjects. Calculate power for the following conditions:
a. N = 15, a = .051 tail, Preal = 0.70.
b. N = 20, a = .051 tail, Preal = 0.70.
c. Based on your calculations, how many subjects will you test?
PLease provide a detailed answer
Solutions
orchestra answered 2 years agoRelated Solutions
You are considering testing a new drug that is supposed to facilitate learning in mentally retarded...
You are considering testing a new drug that is supposed to
facilitate learning in mentally retarded children. Based on
preliminary research, you have some idea about the size of the
drug's effect. Because of your work schedule you can either do the
test with 15 subjects or with 20. You would like to only run 15
subjects, but if running 20 will make power at least 20% higher,
you will run 20 subjects. Calculate power for the following
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Placebo
Drug A
Drug B
Drug C
3
5
6
7
0
4
3
6
2
2
4
5
0
2
3
4
0
2
4
3
Run the ANOVA and fill in the summary table with the results
obtained:
SS
df
MS
F-ratio
p-value
Between
3
Within
16
TOTAL
19
(Report P-value & F-ratio accurate to 3
decimal places and all other values accurate to 2 decimal
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What...
In testing a new drug, we obtained the following results: Placebo Drug A Drug B Drug...
In testing a new drug, we obtained the following results:
Placebo
Drug A
Drug B
Drug C
6
4
6
7
3
3
3
6
5
1
4
5
3
1
3
4
3
1
4
3
Run the ANOVA and fill in the summary table with the results
obtained:
SS
df
MS
F-ratio
p-value
Between
3
Within
16
TOTAL
19
(Report
P-value & F-ratio accurate to 3 decimal
places and all other values accurate to 2 decimal places.)
What...
In testing a new drug, we obtained the following results: Placebo Drug A Drug B Drug...
In testing a new drug, we obtained the following results:
Placebo
Drug A
Drug B
Drug C
5
4
6
7
2
3
3
6
4
1
4
5
2
1
3
4
2
1
4
3
Run the ANOVA and fill in the summary table with the results
obtained:
SS
df
MS
F-ratio
p-value
Between
3
Within
16
TOTAL
19
(Report P-value & F-ratio accurate to 3
decimal places and all other values accurate to 2 decimal
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