The remaining of the paper formally tests this hypothesis simultaneously accounting for selection on observables and endogeneity by combining matching methods with a bi-directional identification strategy that I next describe.
Table 3 gives the values for the interaction term, which formally tests for a significant difference in the slopes (log10 numbers regressed against Year) inside and outside a given park.
Moreover, Rasch analysis formally tests requirements needed to transform ordinal scales, such as the MFI-20 [ 9, 10], into interval level measurements [ 11].
The log-rank statistic which formally tests whether the Survival Curves for each group overlap was highly significant (χ = 32.26 for >LLOQ and 29.99 for >200, p < 0.0001).
The limit of resolution of V1/2, the parameter with the largest error, was estimated with a z-test which formally tests for the difference between the mean of a population and a hypothetical mean.
An F-test, which formally tests for the difference between the variances of independent populations, was used to determine which of the fitted Boltzmann parameters (Amax, V1/2, k) had the largest variance, and thus the largest experimental error.
