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PSY201 9.30.13 To Post

# 20 standard deviaon m 016 cuto z p 05 onetailed

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Unformatted text preview: of PopulaDon 1 ▪  Basing predicDon on previous research μ = 0.90 7 9/29/13 2.  Figure the raw score cutoﬀ point on the comparison distribuDon needed to reject the null hypothesis a)  On the comparison distribuDon, shade the alpha region (region more extreme than the criDcal value); this is the alpha region [email protected] 2: DistribuDon of means Mean: μM = 1.20 Standard [email protected]: σM = 0.16 Cutoﬀ Z (p < .05, one ­tailed) : Z = 1.645 0.88 1.04 1.2 1.36 1.52 [email protected] 2: DistribuDon of means Mean: μM = 1.20 Standard [email protected]: σM = 0.16 Cutoﬀ Z (p < .05, one ­tailed) : Z =  ­1.645 0.88 1.04 1.2 1.36 1.52 Z =  ­1.645 8 9/29/13 [email protected] 2: DistribuDon of means Mean: μM = 1.20 Standard [email protected]: σM = 0.16 Cutoﬀ Z (p < .05, one ­tailed) : Z =  ­1.645 Cutoﬀ Raw = (Cutoﬀ Z)(σM) + μM =  ­1.645(.16) + 1.20 = 0.94 0.88 1.04 1.2 1.36 1.52 Z =  ­1.645, Raw = 0.94 [email protected] 2: DistribuDon of means Mean: μM = 1.20 Standard [email protected]: σM = 0.16 Cutoﬀ Z (p < .05, one ­tailed) : Z =  ­1.645 Cutoﬀ Raw = (Cutoﬀ Z)(σM) + μM =  ­1.645(.16) + 1.20 = 0.94 Shaded region is alpha 0.88 1.04 1.2 1.36 1.52 Z =  ­1.645, Raw = 0.94 3.  Figure the Z score for this cutoﬀ point, but on the distribuDon of means for PopulaDon 1 a)  On the distribuDon of means for PopulaDon 1, shade the region more extreme this Z score; this shaded region shows the power of the study 9 9/29/13 0.58 0.74 0.9 1.06 1.22 [email protected] 1: Dis of means Predicted Mean: μM = .90 Sta...
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