Could someone help me with this question it's from the cgp s2 edexcel book but I don't have the answers. Samples of pond water have been examined under a microscope by a biologist investigating a particular micro-organism. She found that on average each sample contained 8 of these micro-organisms. She takes a sample from a different pond and is not sure whether the results will be different. There are 15 microorganisms in her first sample. Is this signifcant at the 5% level? So I've got Ho: lambda=8 and H1:lambda >8 what do I do next?