Combined results: 17 pillbugs in moist chamber, 3 in dry chamber per trial average (n = 20 each trial, 5 trials).
What is the chi-square value for the chamber distribution (expected 10/10)?
- A
About 0.5
- Bcheck_circle
About 9.8
- C
About 20.0
- D
About 14.0
Explanation
Chi-square = (17-10)^2/10 + (3-10)^2/10 = 49/10 + 49/10 = 9.8. With df=1 and critical value 3.84 at p=0.05, we reject the null and conclude pillbugs prefer moist habitat.