The question was: The lower limit on the difference between the charismatic instructor's and the punitive instuctor's rating based on the 95% confidence interval is
Your Answer: 0.686
Correct Answer: 0.068
Explanation: The95% confidence interval is given in the column labeled "95% CI for Diff" and has 0.068 as its lower bound. The same value is obtained whether or not homogeneity of variance is assumed (row with "Equal" in first column) or not assumed (row with "Unequal" in first column).
t-test for Equality of Means
|
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Variances | t-value | df | 2-Tail SIG | SE of Diff | 95% CI for Diff |
---|---|---|---|---|---|
Equal
|
2.45
|
47
|
0.018
|
0.154
|
(0.068, 0.686)
|
Unequal
|
2.45
|
46.83
|
0.018
|
0.154
|
(0.068, 0.687)
|