Question

A researcher was interested in studying chromosomal damage in fish caused by water pollution. The lake where samples were taken was divided into three separate/independent sections. At each of the three sampling stations, two fish samples were taken. DNA samples were processed and the number of genetic polymorphisms in each of the six fish were recorded.

NOTE: there was only funding to run six genetic analyses. So with three sample sites (a control area with fresh water, a highly polluted area – next to an oil refinery, and an intermediate area) two fish were caught at each site for analysis.

1. Can a parametric statistical test be used? Explain.

2.         What search terms would you use to look online or in a book to determine what statistical test should be used? Even if you know what test to use, think through how you would search/double-check your work.

3. What statistical test is appropriate for this situation? Provide some evidence supporting your decision.

4. State the H_O and H_A for this statistical test.

Answer 1

4. H0: There is no significant difference in the mean number of genetic polymorphsms

   H1: There is significant difference in the mean number of genetic polymorphisms

3. If the population is noormally distributed one way ANOVA can be used.

1. PArametric tests can be used if the population is normally distrbuted.