CHAPTER TEST Solve the following problems completely. An article in the Journal of Environmental Engineering (1989, Vol. 115(3), reported the results of a study on the occurrence of sodium and...


CHAPTER TEST<br>Solve the following problems completely.<br>An article in the Journal of Environmental Engineering (1989, Vol. 115(3), reported the<br>results of a study on the occurrence of sodium and chloride in surface streams in central<br>Rhode Island. The following data are chloride concentration y (in milligrams per liter) and<br>roadway area in the watershed x (in percentage).<br>y<br>y<br>y<br>X<br>0.19<br>4.4<br>0.15<br>6.6<br>0.57<br>9.7<br>0.70<br>10.6<br>0.67<br>10.8<br>0.63<br>10.9<br>0.47<br>11.8<br>0.70<br>12.1<br>0.60<br>14.3<br>0.78<br>14.7<br>0.81<br>15.0<br>0.78<br>17.3<br>0.69<br>19.2<br>1.30<br>23.1<br>1.05<br>27.4<br>1.06<br>27.7<br>1.74<br>31.8<br>1.62<br>39.5<br>

Extracted text: CHAPTER TEST Solve the following problems completely. An article in the Journal of Environmental Engineering (1989, Vol. 115(3), reported the results of a study on the occurrence of sodium and chloride in surface streams in central Rhode Island. The following data are chloride concentration y (in milligrams per liter) and roadway area in the watershed x (in percentage). y y y X 0.19 4.4 0.15 6.6 0.57 9.7 0.70 10.6 0.67 10.8 0.63 10.9 0.47 11.8 0.70 12.1 0.60 14.3 0.78 14.7 0.81 15.0 0.78 17.3 0.69 19.2 1.30 23.1 1.05 27.4 1.06 27.7 1.74 31.8 1.62 39.5
MATH 403- ENGINEERING DATA ANALYSIS<br>6. Find a 99% confidence interval of Mean chloride concentration when roadway area<br>x = 1.0%<br>7. Find a 99% prediction interval on chloride concentration when roadway area x =<br>1.0%.<br>8. Plot the residuals versus ŷ and versus x. Interpret these plots.<br>9. Prepare a normal probability plot of the residuals. Does the normality assumption<br>appear to be satisfied?<br>10. Determine the correlation coefficient and the coefficient of determination.<br>

Extracted text: MATH 403- ENGINEERING DATA ANALYSIS 6. Find a 99% confidence interval of Mean chloride concentration when roadway area x = 1.0% 7. Find a 99% prediction interval on chloride concentration when roadway area x = 1.0%. 8. Plot the residuals versus ŷ and versus x. Interpret these plots. 9. Prepare a normal probability plot of the residuals. Does the normality assumption appear to be satisfied? 10. Determine the correlation coefficient and the coefficient of determination.

Jun 11, 2022
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