IQ tests are sometimes used to assess children’s cognitive
abilities. However, typical IQ tests draw on...
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IQ tests are sometimes used to assess children’s cognitiveabilities. However, typical IQ tests draw on reading skills,which
may translate into lower scores for dyslexic children.Nonverbal IQ tests should circumvent this issue, allowing us toask
whether there is a relationship between reading skills andcognitive abilities in dyslexic children. The table below gives thereading
skill scores (on a standardized scale) and the nonverbal IQscores (also on a standardized scale) of 22 dyslexic childrenaged
7 to 10 years. Are the reading skill scores and nonverbalIQ scores significantly correlated in young dyslexicchildren?
Child #
Reading skill score
Nonverbal IQ score
1
84
93
2
81
103
3
85
102
4
82
99
5
87
98
6
85
91
7
89
123
8
86
95
9
85
125
10
83
75
11
76
106
12
76
77
13
75
98
14
78
108
15
86
96
16
73
86
17
79
117
18
95
119
19
85
91
20
93
103
21
84
84
22
88
93
Ho:
Ha:
test-statistic:
df:
Exact P value for the test-statistic
Conclusion relative to the hypothesis:
ts= ,df= ,P=
Answer & Explanation
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correlation coefficient between Reading skill score and Nonverbal IQ score in young dyslexic childrenNull hypothesis Ho 0Alternate Hypothesis Ha 0Formula for sample correlation coefficient rx Reading skill scorey Non verbal IQ scoreChild xReading skill
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