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In a study of memory process, rats were first presented with afear-inducing stimulus on a learning task as soon as they steppedacross a line in a test chamber. Afterwards, the rats were dividedand given electrical stimulation either 50 or 150 millisecondsafter crossing the line. In addition, the rats differed in terms ofthe area in which the stimulation electrodes were implanted intheir brains (Neutral Area, Area A, or Area B). Researchers wereinterested in the time it took the animals to re-cross the line ona subsequent learning task. The idea is that stimulation of certainareas in the brain would interfere with memory and hence delaylearning to avoid the line on the subsequent learning task. Thedata on time to re-cross the line are below. What can be concludedwith an ? of 0.05?

                     Area

Time	neutral	A	B
50	26 31 29 41 21	12 19 25 16 15	24 18 19 29 24
150	26 29 24 18 33	26 31 38 30 24	27 20 29 29 22

a) What is the appropriate test statistic?
---Select--- na one-way ANOVA within-subjects ANOVA two-wayANOVA

b) Compute the appropriate test statistic(s) tomake a decision about H₀.
Time: critical value =  ; test statistic=  
Decision:  ---Select--- Reject H0 Fail to reject H0

Area: critical value =  ; test statistic=  
Decision:  ---Select--- Reject H0 Fail to reject H0

Interaction: critical value =  ; teststatistic =  
Decision:  ---Select--- Reject H0 Fail to reject H0


c) Compute the corresponding effect size(s) andindicate magnitude(s).
Time: ?²=  ;  ---Select--- na trivial effect smalleffect medium effect large effect
Area: ?²=  ;  ---Select--- na trivial effect smalleffect medium effect large effect
Interaction: ?²=  ;  ---Select--- na trivial effect smalleffect medium effect large effect


d) Make an interpretation based on theresults.

There is a time difference in the time it took to step acrossthe line.

There is no time difference in the time it took to step acrossthe line.    

There is an area difference in the time it took to step acrossthe line.

There is no area difference in the time it took to step acrossthe line.    

There is a time by area interaction in the time it took to stepacross the line.

There is no time by area interaction in the time it took to stepacross the line.