Typha swamp

Open water

Mean

9.2

2.2

Variance

41.51111

1.733333

Observations

10

10

Pooled variance

21.62222

Hypothesized mean difference

0

Df

18

t Stat

3.366145

P(T ≤ t) one-tail

0.00172

t critical one-tail

1.734064

P(T ≤ t) two-tail

0.00344

t critical two-tail

2.100922