Consider the following core wood density measurements (g/mm³) from a sample of 25 canopy trees in western Thailand (“Radial Variation of Wood Functional Traits Reflect Size-Related Adaptations of Tree Mechanics and Hydraulics,” Functional Ecology 2017: 260–272)

a. Perform a hypothesis test at the .05 level to determine if the true mean core wood density differs from 600 g/mm³.
b. This data appeared in Example 8.11, where a 95% CI for l was computed to be (528.0, 613.8). Explain how the results of your hypothesis test in part (a) are consistent with this confidence interval.

Example 8.11

Transcribed Image Text:

391.2 431.0 447.1 375.3 470.7 601.8 598.8 543.7 592.7 546.7 492.3 454.4 548.7 494.9 585.6 647.8 639.2 700.4 640.1 620.5 755.2 668.7 644.6 717.7 663.0