Premature babies are typically born underweight and are cared for in a neonatal intensive care unit (NICU). At a certain NICU, the mean weight of all the male babies is 4 pounds, and the mean weight of all the female babies is 3.6 pounds. Which of the following must be true about the mean weight w of the combined group of male and female babies at this NICU?
A. w = 3.8
B. w > 3.8
C. w < 3.8
D. 3.6 < w < 4
Answer:D
Premature babies are typically born underweight and are cared for in a neonatal intensive care unit (NICU). At a certain NICU, the mean weight of all the male babies is 4 pounds, and the mean weight of all the female babies is 3.6 pounds. Which of the following must be true about the mean weight w of the combined group of male and female babies at this NICU?
A. w = 3.8 B. w > 3.8 C. w < 3.8 D. 3.6 < w < 4
Explanation: D