(Solved): Q4. The mean output of solar cells of three types are measured six times under random light intensi ...

Q4. The mean output of solar cells of three types are measured six times under random light intensity over a period of 5 minutes, yielding the following results. Solar cell output (watts) (a) Using a parametric test at the 5 per cent level of significance undertake a hypothesis test to determine if the mean solar cell output is the same for all cell types. (b) Using a non-parametric test at the 5 per cent level of significance undertake a hypothesis test to determine if the mean solar cell output is the same for all cell types. (c) Outline the advantages and disadvantages of non-parametric tests compared to parametric tests. (d) Explain what is meant by a type I error and a type II error in hypothesis testing using relevant examples.