3. The regression line, standard error, and Sxx for the data set are given below. The predictor value is x=3. Use the information to do parts (a) through (d). y= -4.00 +2.20x, se = 1.18322, Sxx = 5 x 3 y 3 45 1 2 -1 a. Determine a point estimate for the conditional mean of the response variable corresponding to the specified value of the predictor variable. (Type an integer or a decimal.) b. Find a 95% confidence interval for the conditional mean of the response variable corresponding to the specified value of the predictor variable. The confidence interval is from (Round to two decimal places as needed.) to c. Determine the predicted value of the response variable corresponding to the specified value of the predictor variable. = (Type an integer or a decimal.) d. Find a 95% prediction interval for the value of the response variable corresponding to the specified value of the predictor variable. The prediction interval is from (Round to two decimal places as needed.) to