3. You wish to determine the effects of a preschool enrichment program on verbal 3. intelligence. Using
Question:
3. You wish to determine the effects of a preschool enrichment program on verbal 3.
intelligence. Using a standardized instrument with μ 100 and σ 15, you intend to compare a group of children participating in the enrichment program with a matched group of nonparticipating children; α is set at .05 (one-tailed). How large a sample size
(for each group) would be needed to ensure a .90 probability of detecting a true difference of:
(a) 3 IQ points?
(b) 9 IQ points?
(c) 15 IQ points?
(d) 21 IQ points?
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Related Book For 
Fundamentals Of Statistical Reasoning In Education
ISBN: 9781118425213
4th Edition
Authors: Theodore Coladarci, Casey D. Cobb
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