# Question: The data for shell thickness and concentration of PCBs for

The data for shell thickness and concentration of PCBs for 60 Anacapa pelican eggs from Exercise 4.70 are on the WeissStats CD.

In exercise Polychlorinated biphenyls (PCBs), industrial pollutants, are known to be a great danger to natural ecosystems. In a study by R. W. Risebrough titled "Effects of Environmental Pollutants Upon Animals Other Than Man" (Proceedings of the 6th Berkeley Symposium on Mathematics and Statistics, VI, University of California Press, pp. 443-463), 60 Anacapa pelican eggs were collected and measured for their shell thickness, in millimeters (mm), and concentration of PCBs, in parts per million (ppm). The data are on the WeissStats CD.

a. Decide whether finding a regression line for the data is reasonable. If so, then also do parts (b)–(d).

b. Obtain the coefficient of determination.

In exercise Polychlorinated biphenyls (PCBs), industrial pollutants, are known to be a great danger to natural ecosystems. In a study by R. W. Risebrough titled "Effects of Environmental Pollutants Upon Animals Other Than Man" (Proceedings of the 6th Berkeley Symposium on Mathematics and Statistics, VI, University of California Press, pp. 443-463), 60 Anacapa pelican eggs were collected and measured for their shell thickness, in millimeters (mm), and concentration of PCBs, in parts per million (ppm). The data are on the WeissStats CD.

a. Decide whether finding a regression line for the data is reasonable. If so, then also do parts (b)–(d).

b. Obtain the coefficient of determination.

## Answer to relevant Questions

The data for per capita income and per capita beer consumption for the 50 states and Washington, D.C., from Exercise 4.71 are on the WeissStats CD. In exercise Does a higher state per capita income equate to a higher per ...As we noted, because of the regression identity, we can express the coefficient of determination in terms of the total sum of squares and the error sum of squares as r2 = 1 − SSE/SST. a. Explain why this formula shows that ...a. Definition 4.7 on page 171. b. Formula 4.3 on page 171. Compare your answers in parts (a) and (b). Following are the data on age and crown-rump length for fetuses from Exercises 4.54 and 4.92. a. Obtain the linear correlation coefficient. b. Interpret the value of r in terms of the linear relationship between the two ...The data from Exercise 4.68 for home size (in square feet) and assessed value (in thousands of dollars) for the same homes as in Exercise 4.135 are on the WeissStats CD. a. Decide whether use of the linear correlation ...Post your question