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Do nematodes affect plant growth? A botanist prepares 16 identical planting pots and adds different numbers of nematodes into the pots. Seedling growth (in mm) is recorded two weeks later.

Nematodes and plant growth

Nematodes

0

10.8

9.1

13.5

9.2

10.65

1,000

11.1

11.1

8.2

11.3

10.43

5,000

5.4

4.6

7.4

5

5.6

10,000

5.8

5.3

3.2

7.5

5.45

Seedling growth

overall mean 8.03

x

i

Hypotheses: All i are the same (H0)

versus not All i are the same (Ha)

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