The mean body mass index (BMI) for boys age 12 is 23.6 kg/m2. An investigator wants to test if the BMI is higher in 12-year-old boys living in New York City. How many boys are needed to ensure that a two-sided test of hypothesis has 80% power to detect a difference in BMI of 2 kg/m2? Assume that the standard deviation in BMI is 5.7 kg/m2. Group of answer choices 54 64 74 94
The mean body mass index (BMI) for boys age 12 is 23.6 kg/m2. An investigator wants to test if the BMI is higher in 12-year-old boys living in New York City. How many boys are needed to ensure that a two-sided test of hypothesis has 80% power to detect a difference in BMI of 2 kg/m2? Assume that the standard deviation in BMI is 5.7 kg/m2. Group of answer choices 54 64 74 94
Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter10: Statistics
Section10.3: Measures Of Spread
Problem 26PFA
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The mean body mass index (BMI) for boys age 12 is 23.6 kg/m2. An investigator wants to test if the BMI is higher in 12-year-old boys living in New York City. How many boys are needed to ensure that a two-sided test of hypothesis has 80% power to detect a difference in BMI of 2 kg/m2? Assume that the standard deviation in BMI is 5.7 kg/m2.
Group of answer choices
54
64
74
94
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