Question: 2. A sample of 25 subjects were given two tests (labelled X and Y), leading to the following sample statistics: X-bar = 65 Y-bar = 42 SX = 10 SY = 8 In addition, the correlation between X and Y was found to be .65. a) What are the values of SSX, SSY, and SSXY? b) What are the values of b1 and b0? Show two ways to compute b1. c) Test rXY and b1 for significance (α ≤ .01),
Question: 2. A sample of 25 subjects were given two tests (labelled X and Y), leading to the following sample statistics: X-bar = 65 Y-bar = 42 SX = 10 SY = 8 In addition, the correlation between X and Y was found to be .65. a) What are the values of SSX, SSY, and SSXY? b) What are the values of b1 and b0? Show two ways to compute b1. c) Test rXY and b1 for significance (α ≤ .01),
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
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Question:
2. A sample of 25 subjects were given two tests (labelled X and Y), leading to the following sample statistics:
X-bar = 65 Y-bar = 42
SX = 10 SY = 8
In addition, the correlation between X and Y was found to be .65.
a) What are the values of SSX, SSY, and SSXY?
b) What are the values of b1 and b0? Show two ways to compute b1.
c) Test rXY and b1 for significance (α ≤ .01), confirming that you obtain the same tobt in both analyses.
Answers:
2.a) 2400, 1536, 1248
b) .52, 8.2
c) t = 4.102, Reject H0: The correlation and the slope are both significant.
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