Use Table 10 of Appendix B to determine a 95% confidence interval for the true population linear correlation coefficient based on the following sample statistics. (Glve your answers correct to two decimal places.) (a) n = 8, r = 0.20 -.22 X to 1.02 (b) n = 100, r = -0.40 -.55 to -.22 (c) n = 25, r = 0.65 x to .87 (d) n = 15, r = -0.25 -.62 x to

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Use Table 10 of AppendixB to determine a 95% confidence interval for the true population linear correlation coefficient based on the following sample statistics. (Glve your
answers correct to two decimal places.)
(a) n = 8, r= 0.20
-.22
X to 1.02
(b) n = 100, r = -0.40
-.55
to -.22
(c) n = 25, r = 0.65
X to .87
(d) n = 15, r = -0.25
-.62
x to
Transcribed Image Text:Use Table 10 of AppendixB to determine a 95% confidence interval for the true population linear correlation coefficient based on the following sample statistics. (Glve your answers correct to two decimal places.) (a) n = 8, r= 0.20 -.22 X to 1.02 (b) n = 100, r = -0.40 -.55 to -.22 (c) n = 25, r = 0.65 X to .87 (d) n = 15, r = -0.25 -.62 x to
Table 10 Confidence Belts for the Correlation Coefficient (1-a)=0.95
The numbers on the curves are sample sizes.
+1.0
+0.8
+0.6
+0.4
8 925 83 品
+0.2
100
200
400
400
200
100
-0.2
-0.4
-0.6
-0.8
-1.0
-1.0
-0.8
-0.6
-0.4
-0.2
+0.2
+0.4
Scale of r (sample correlation)
+0.6
+0.8
+1.0
Scale of p (population correlation coefficient)
Transcribed Image Text:Table 10 Confidence Belts for the Correlation Coefficient (1-a)=0.95 The numbers on the curves are sample sizes. +1.0 +0.8 +0.6 +0.4 8 925 83 品 +0.2 100 200 400 400 200 100 -0.2 -0.4 -0.6 -0.8 -1.0 -1.0 -0.8 -0.6 -0.4 -0.2 +0.2 +0.4 Scale of r (sample correlation) +0.6 +0.8 +1.0 Scale of p (population correlation coefficient)
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