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MATLAB: An Introduction with Applications
6th Edition
ISBN: 9781119256830
Author: Amos Gilat
Publisher: John Wiley & Sons Inc
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
Transcribed Image Text:1.
Verbal ability consists of at least two components: verbal
comprehension (e.g., reading ability) and verbal fluency (e.g., writing
ability). A researcher measures these two components in a sample of
8 seventh-grade children and obtains the following scores:
Comprehension
Fluency
57
40
74
46
42
38
48
36
75
54
62
42
76
50
69
25
2.
a) Is there a significant correlation between the two variables (a
≤ .05)?
b) If another seventh-grader obtained a verbal comprehension score of
70, what would his or her predicted verbal fluency score be?
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, SS, and SSXY?
b) What are the values of bl and b0? Show two ways to compute bl.
c) Test rxy and b1 for significance (a < .01), confirming that you obtain
the same tot in both analyses.
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