Please answer the wrong and letter D thank you! The efficiency for a steel specimen immersed in a phosphating tank is the weight of the phosphate coating divided by the metal loss (both in mg/ft2). An article gave the accompanying data on tank temperature (x) and efficiency ratio (y).176177 1781.00Temp.173 174175175171Ratio 0.86 1.41 1.38 1.09 1.05Temp. 181 181 181181181Ratio 1.55 1.56 1.69 2.15 2.17 0.82Temp. 183 183183 185 185Ratio 1.75 1.96 2.76 1.53 2.50LUSE SALT0.94 1.86182 182 1831.49 0.88(a) Determine the equation of the estimated regression line. (Round all numerical values to four decimal places.)y = 15.2202 +0.0937x0.040.84186 187 1892.94 1.91 3.06(b) Calculate a point estimate for true average efficiency ratio when tank temperature is 183. (Round your answer to four decimal places.)21.9209✔✓✓✓✓(c) Calculate the values of the residuals from the least squares line for the four observations for which temperature is 183. (Round your answers to two decimal places.)(183, 0.88)-1.04(183, 1.75)-0.17(183, 1.96)(183, 2.76)Why do they not all have the same sign?O These residuals do not all have the same sign because in the case of the third pair of observations, the observed efficiency ratio was equal to the predicted value. In the cases of the other pairs of observations, the observed efficiency ratios were smaller than the predicted value.O These residuals do not all have the same sign because in the case of the second pair of observations, the observed efficiency ratio was equal to the predicted value. In the cases of the other pairs of observations, the observed efficiency ratios were larger than the predicted value.These residuals do not all have the same sign because in the cases of the first two pairs of observations, the observed efficiency ratios were smaller than the predicted value. In the cases of the last two pairs of observations, the observed efficiency ratios were larger than the predictedvalue.O These residuals do not all have the same sign because in the cases of the first two pairs of observations, the observed efficiency ratios were larger than the predicted value. In the cases of the last two pairs of observations, the observed efficiency ratios were smaller than the predictedvalue.(d) What proportion of the observed variation in efficiency ratio can be attributed to the simple linear regression relationship between the two variables? (Round your answer to three decimal places.)B

Question

Accepted Answer

Given data:

Temp
Ratio

171
0.86

173
1.41

174
1.38

175
1.09

175
1.05

176
1

177
0.94…