The following data are from a laboratory experiment by Smallwood et al. in which liver preparation from five rats were used to measure the relationship between the administered concentration of taurocholate ( a salty normally occurring in liver bile) and the unbound fraction of taurocholate in the liver.

Rat Concentration (μm) unbound fraction

1 3 0.63

2 6 0.44

3 12 0.31

4 24 0.19

5 48 0.13

Please answer all parts to get lifesaver. Thanks.

a) Calculate the correlation coefficient between the taurocholate unbound fraction and the concentration.
b) Plot the relationship between the two variables in the graph.
c) Examine the plot in part (b). The relationship appears to be maximally strong, yet the correlation coefficient you calculated in part (a) is not near the maximum possible value why or why not?
d) What steps would you take with these data to meet the assumption of correlation analysis?