The IQ of a 6 -year-old with a measured mental age of 9 would be a. 67 b. 133 c. 86 d. 150
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Step 1: Calculate the IQ using the formula: IQ = (mental age/chronological age) * 100 Show more…
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The intelligence quotient, or $1 Q$, of a 6 . year-old with a mental age of 9 would be a. 67. b. 133. c. 86. d. 150.
Intelligence quotient, or $10,$ was originally defined as mental age divided by chronological age and multiplied by 100. By this definition, the 10 of a 6-year-old with a measured mental age of 9 would be a. 67 b. 133 c. 86 d. 150
IQ and reading scores Data on the 1$Q$ test scores and reading test scores for a group of fifth-grade children give the following regression line: predicted reading score $=-33.4+0.882(1 Q \text { score). }$ (a) What's the slope of this line? Interpret this value in context. (b) What's the intercept? Explain why the value of the intercept is not statistically meaningful. (c) Find the predicted reading scores for two children with IQ scores of 90 and 130 , respectively.
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