Applying the Concepts-Intermediate 10.102 Baiting traps to maximize beetle catch

Question

Applying the Concepts-Intermediate 10.102 Baiting traps to maximize beetle catch. A field experiment D was conducted to compare the effectiveness of different BEETLES traps for catching beetles (Journal of Chemical Ecology Vol. 94, 2011). Paraffin traps were baited either with or without linalool. Also, the color of the trap was varied as green or yellow. Seven traps for each combination of bait and color-a total of 28 traps-were set 1 meter from the ground in a random grid pattern. After 5 days, the total number of beetles captured by each trap was deter- mined. The data (simulated from information provided in the journal article) are displayed in the following table. The researchers are investigating the effect of bait type and color on the mean number of beetles captured by the traps. Analyze the data for the researchers. What do you conclude? Yellow Green With linalool Without linalool 17, 22, 13, 15, 14, 18,1 29, 10, 6, 5, 12,11,13 4,5,0,2,3,2,0 1,0,2,0,0, 0,1

Explanation / Answer

The analysis is conducted by using the two way ANOVA and the result are given below.

Two-way ANOVA: Beetle versus Bait, Colour

Source DF SS MS F P
Bait 1 46.29 46.29 2.30 0.143
Colour 1 1106.29 1106.29 54.86 0.000
Interaction 1 5.14 5.14 0.26 0.618
Error 24 484.00 20.17
Total 27 1641.71

S = 4.491 R-Sq = 70.52% R-Sq(adj) = 66.83%

Comment: The p-value which is less than 0.05 at the above table is only for Colour. Hence, we can conclude that due to the difference of colour, the mean beetles are significantly different at 0.05 level of significance.

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