Use the results of Groth (1992), where researchers conducted a large observational study where n=3647 crossbills were observed in the wild, 1752 of which were right-billed and 1895 of which were left-billed to conduct a z-test. Report your test statistic, p-value, and estimated effect size, each rounded to four decimal places: z-score: p-value: est. effect size:
