French Wade

01/18/2023 · Elementary School

Deer mice (Peromyscus maniculatus) are small rodents native to North America. Their adult body lengths (excluding tail) are known to vary approximately Normally, with mean \( \mu=86 \) millimeters (mm) and standard deviation \( \sigma=8 \mathrm{~mm} \). Deer mice are found in diverse habitats and exhibit different adaptations to their environment. A random sample of 14 deer mice in a rich forest habitat gives an average body length of \( \bar{x}=91.1 \) mm . Assume that the standard deviation \( \sigma \) of all deer mice in this area is also 8 mm. Here is the output from the TI-83 graphing calculator for a \( 95 \% \) confidence interval based on these findings: ZInterval (86.909, 95.291)