Final answer:
To determine the unusualness of the current density of umbrella trees, estimate the probability of observing a historical density that is equal to, less than, or greater than the current density.
Step-by-step explanation:
To determine if the current density of umbrella trees is unusual enough to cause the bore blasters to disperse, you should estimate the probability of observing a historical density of umbrella trees that is equal to, less than, or greater than the current density. This involves comparing the current density to past data and assessing the likelihood of such densities occurring by chance.
For example, if the current density of umbrella trees is higher than what has been observed historically, the probability of observing such a high density will be low, indicating that it is unusual. Conversely, if the current density is lower than historical values, the probability of observing such a low density will also be low.
By estimating these probabilities, you can determine if the current density of umbrella trees is statistically significant and likely to cause the bore blasters to disperse.