Suppose an equal number of 12- to 14-year-old girls below and above the poverty level are recruited to study differences in calcium intake. How many girls should be recruited to have an 80% chance of detecting a significant difference using a two-sided test with α = .05
Suppose an equal number of 12- to 14-year-old girls below and above the poverty level are recruited to study differences in calcium intake. How many girls should be recruited to have an 80% chance of detecting a significant difference using a two-sided test with α = .05
A First Course in Probability (10th Edition)
10th Edition
ISBN:9780134753119
Author:Sheldon Ross
Publisher:Sheldon Ross
Chapter1: Combinatorial Analysis
Section: Chapter Questions
Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...
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The mean ±1 sd of ln [calcium intake (mg)] among 25
females, 12 to 14 years of age, below the poverty level is
6.56 ± 0.64. Similarly, the mean ± 1 sd of ln [calcium intake
(mg)] among 40 females, 12 to 14 years of age, above the
poverty level is 6.80 ± 0.76.
*8.7 Suppose an equal number of 12- to 14-year-old girls
below and above the poverty level are recruited to study
differences in calcium intake. How many girls should be
recruited to have an 80% chance of detecting a significant
difference using a two-sided test with α = .05?
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