A marine biologist conducted a Chi-square test of independence to investigate whether there is a significant association between the type of crab species (Fiddler crab vs. Hermit crab) and their preferred shoreline substrate (muddy vs. sandy).
After analyzing the field observations, the calculated value of Chi-square was found to be χ2=2.15\chi^2 = 2.15χ2=2.15. The critical value table for df=1df = 1df=1 indicates that the critical value at the p≤0.05 p \le 0.05\,p≤0.05 significance level is 3.84.
Based on these values, explain what conclusions can be drawn from this statistical analysis.
513 exam-style questions on OCR A Level Psychology Data recording, analysis and presentation. Each one has a worked solution and a mark scheme showing where the marks go.