Method 1)         We investigate the distribution of Benthic invertebrates at the Nant Iago stream, which is near Abergaveng in South Wales; 2)         We measured a 150 m stretch of the stream, each group had a 10 m stretch meter long of stream; 3)         A surber sample was used, the size of the holes in the net was 1 mm2, while the size of the quadrat was 0.1 m2 (this size prevents the invertebrates from passing through the holes, but small particles of …showed first 75 words of 2584 total…

…showed last 75 words of 2584 total…my results and at the group's results I can say that the confidence level that I worked up with the ÷2 equaling 113.78, which means that it is 95% or even 99.9% certain that the null hypothesis was wrong, therefore that the alternative hypothesis was right. Group's results per m2: Sandy region - 97 chironomus per m2 Stony region - 6 chironomus per m2 My own results per m2: Sandy region - 10 chironomus per m2 Stony region - 0 chironomus per m2