USE THE 8-STEP HYPOTHESIS TESTING Refer to the study by Carter et al. [A-9], who investigated the effect of age at onset of bipolar disorder on the course of the illness. One of the variables studied was subjects' family history. Table 3.4.1 shows the frequency of a family history of mood disorders in the two groups of interest: early age at onset (18 years or younger) and later age at onset (later than 18 years). Family History of Mood Disorders Early ≤ 18(E) Later > 18 (L) 28 35 19 38 41 44 53 60 Total 141 177 318 Source: Tasha D. Carter, Emanuela Mundo, Sagar V. Parkh, and James L. Kennedy, "Early Age at Onset as a Risk Factor for Poor Outcome of Bipolar Disorder," Journal of Psychiatric Research, 37 (2003), 297-303. Negative (A) Bipolar disorder (B) Unipolar (C) Unipolar and bipolar (D) Total 63 57 85 113 Can we conclude on the basis of these data that subjects 18 or younger differ from subjects older than 18 with respect to family histories of mood disorders? Let α = .05.

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USE THE 8-STEP HYPOTHESIS TESTING
Refer to the study by Carter et al. [A-9], who investigated the effect of age at onset of bipolar disorder
on the course of the illness. One of the variables studied was subjects' family history. Table 3.4.1
shows the frequency of a family history of mood disorders in the two groups of interest: early age at
onset (18 years or younger) and later age at onset (later than 18 years).
Family History of Mood
Disorders
Early ≤ 18(E)
28
19
41
53
Later > 18 (L)
35
38
44
60
141
Total
63
57
85
113
Negative (A)
Bipolar disorder (B)
Unipolar (C)
Unipolar and bipolar (D)
Total
177
318
Source: Tasha D. Carter, Emanuela Mundo, Sagar V. Parkh, and James L. Kennedy,
"Early Age at Onset as a Risk Factor for Poor Outcome of Bipolar Disorder," Journal of
Psychiatric Research, 37 (2003), 297-303.
Can we conclude on the basis of these data that subjects 18 or younger differ from subjects older than
18 with respect to family histories of mood disorders? Let a = .05.
Transcribed Image Text:USE THE 8-STEP HYPOTHESIS TESTING Refer to the study by Carter et al. [A-9], who investigated the effect of age at onset of bipolar disorder on the course of the illness. One of the variables studied was subjects' family history. Table 3.4.1 shows the frequency of a family history of mood disorders in the two groups of interest: early age at onset (18 years or younger) and later age at onset (later than 18 years). Family History of Mood Disorders Early ≤ 18(E) 28 19 41 53 Later > 18 (L) 35 38 44 60 141 Total 63 57 85 113 Negative (A) Bipolar disorder (B) Unipolar (C) Unipolar and bipolar (D) Total 177 318 Source: Tasha D. Carter, Emanuela Mundo, Sagar V. Parkh, and James L. Kennedy, "Early Age at Onset as a Risk Factor for Poor Outcome of Bipolar Disorder," Journal of Psychiatric Research, 37 (2003), 297-303. Can we conclude on the basis of these data that subjects 18 or younger differ from subjects older than 18 with respect to family histories of mood disorders? Let a = .05.
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