A psychiatrist is wants to understand the effect of rationality on phobias. The psychiatrist has maternal twin patients with Scoleciphobia. In an experiment designed to induce anxiety, the psychiatrist randomly assigned one of the twins to look at real worms in a small glass tank and the other twin looks at pictures of worms. The anxiety scores for the patients are below where a higher score indicates more anxiety. What can be concluded with α = 0.10? real picture 3646415235562631454050 3853586858533833536342 A) critical value equals= test statistic equals= B) What is the CI? C) Compute the corresponding effect size(s) and indicate magnitude(s) d= r2
A psychiatrist is wants to understand the effect of rationality on phobias. The psychiatrist has maternal twin patients with Scoleciphobia. In an experiment designed to induce anxiety, the psychiatrist randomly assigned one of the twins to look at real worms in a small glass tank and the other twin looks at pictures of worms. The anxiety scores for the patients are below where a higher score indicates more anxiety. What can be concluded with α = 0.10?
| real | picture |
| 36 46 41 52 35 56 26 31 45 40 50 |
38 53 58 68 58 53 38 33 53 63 42 |
A)
critical value equals=
test statistic equals=
B)
What is the CI?
C) Compute the corresponding effect size(s) and indicate magnitude(s)
d=
r2
A)
The degrees of freedom is,
Thus, the degrees of freedom is 20.
Critical value:
The critical value is calculated by using the level of significance and degrees of freedom,
Thus, the critical value is ±1.725.
Test statistic:
Thus, the test statistic is -2.043.
B)
The standard error is calculated before constructing the confidence interval.
Thus, the standard error is 4.406.
Confidence interval is,
Thus, the 90% confidence interval is (-16.6, -1.4).
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