1. For each of the following patterns of data,
• What is the probability of the researcher having made a Type 1 error?
• What is the probability of the researcher having made a Type 2 error?
• Should the null hypothesis be rejected?
• What conclusions can be drawn about the possibility of the researcher having drawn a statistically invalid conclusion?
|
|
p-value
|
N
|
alpha
|
beta
|
|
a.
|
.03
|
100
|
.05
|
.05
|
|
b.
|
.13
|
100
|
.05
|
.30
|
|
c.
|
.03
|
50
|
.01
|
.20
|
|
d.
|
.03
|
25
|
.01
|
.20
|
|
e.
|
.06
|
1,000
|
.05
|
.70
|
2. A friend of yours reports a study that obtains a p-value of .02. What can you conclude about the finding? List two other pieces of information that you would need to know to fully interpret the finding.