# statistical test

Im working on an experiment for my A level course (UK) that will determine the effects of different respiratory substrates on yeast population growth. Im using 4 sugars; fructose, glucose, sucrose and lactose. Using a haemocytometer I'll find the size of the yeast population before the sugar is added and the growth 1 week after.

I have a choice of 3 statistical tests to choose from: the standard error test; the chi-squared test; and the Mann-Whitney U test. The standard error seems to be the best one to me, but i thought it could only be used for large samples ( at least above 10)?

https://brainmass.com/statistics/normal-distribution/statistical-test-experiments-13927

#### Solution Preview

You can use the standard error test. The standard error test may be used for small sample sizes (less than ...

#### Solution Summary

The solution identifies the statistical test to use. The standard errors which seem to be best are determined.