Research Scenario: You have beenraising Bombina orientalis, or Oriental fire-bellied toads, andmeasured the frogs’ jumps in centimeters. Your latest study looksat males and females’ reactions to being raised in a room withanother animal. You set up three terrariums, each with six male andsix female frogs. Each terrarium is in a separate room. Let A1 =male frogs, A2 =female frogs, B1 = frogs raised in a room with adog, B2 = frogs raised in a room with a cat, and B3 = frogs raisedin a room with a parrot.
| B1 | B2 | B3 |
A1 | 45 | 23 | 39 |
42 | 30 | 27 |
41 | 31 | 31 |
48 | 23 | 27 |
42 | 33 | 37 |
43 | 36 | 24 |
A2 | 32 | 36 | 49 |
29 | 43 | 48 |
31 | 37 | 44 |
33 | 25 | 43 |
25 | 32 | 36 |
34 | 40 | 44 |
1. Restate the research and null hypothesis for each variable(and don’t forget the interaction).
2. What are the degrees of freedom of the F distribution foreach variable and the interaction?
3. What is the value of F for the two main effects?
4. Is there a significant main effect of roommate? Explain andsupport your position.
5. Is there a significant main effect of gender? Explain andsupport your position.
6. Is there a significant interaction between the sex of thefrogs and the species of roommate? Explain and support yourposition.
