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Dependent and Independent Variables Worksheet

Name: Cameron Schafer Date: 08/28/2013

Fill out the following table with data from the lab exercise:

Table 1: Average Yield for each seed variety at no, low, and high infestation levels

Seed Variety
Level of ECB Infestation
Pot 1
Yield
Pot 2
Yield
Pot 3
Yield
Average
Yield
BT 123

None
160.1
164.8
164.2
163.03

Low
164
162.6
168.3
164.97

High
155.1
163
163.9
160.67
BT 456

None
190
183.2
184.8
186

Low
178.8
172.6
179.6
177

High
157.3
157
159
157.77
Golden

None
181.6
182.8
189.8
184.73

Low
177.9
171.2
170.6
173.23

High
135.4
139.6
138.3
137.77
Super Harvest

None
164.1
164.3
161
163.13

Low
159.1
155
157.5
157.2

High
125.5
129
130
128.17

Fill out the following table with data from the lab exercise:

Table 2: % Reduction in yield for each seed variety at high levels of infestation
(transfer data on average yield with no infestation and high infestation from Table 1 to Table 2)

Seed Variety
Avg. Yield with
No Infestation
Avg. Yield with High Infestation
% Reduction
In Yield
BT 123

163.03
160.67
1.45
BT 456

186
157.77
15.18
Golden

184.73
137.77
25.42
Super Harvest

183.13
128.17
30.01

Answer the following questions after completing the lab exercise:

1. For each seed variety, why did you need to collect data from 3 pots for each infestation level to obtain reliable data? To have multiple tests

2. Which seed variety has the highest yield under conditions of no infestation? BT456

3. Which transgenic seed variety was most resistant to the ECB at high infestation levels? BT123

4. Which non-transgenic seed variety was most resistant to the ECB at high infestation levels? Golden

5. Compare the yield of Super Harvest seeds and BT 123 seeds under conditions of no infestation. Is