1. The mean body mass index (BMI) for boys age 12 is 23.6. An investigato 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...


1. The mean body mass index (BMI) for boys age 12 is 23.6. An investigato<br>wants to test if the BMI is higher in 12-year-old boys living in New York<br>City. How many boys are needed to ensure that a two-sided test of<br>hypothesis has 80% power to detect a difference in BMI of 2 units?<br>Assume that the standard deviation in BMI is 5.7.<br>

Extracted text: 1. The mean body mass index (BMI) for boys age 12 is 23.6. An investigato 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 units? Assume that the standard deviation in BMI is 5.7.

Jun 08, 2022
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