Answered>Order 5919

As concrete? cures, it gains strength. The following data represent the? 7-day and? 28-day strength in pounds per square inch? (psi) of a certain type of concrete.

Data:

7-Day_Strength_(psi) x                                     28-Day_Strength_(psi) y

3330                                                                             4850

2620                                                                             4190

2300                                                                             4070

3380                                                                             5020

3390                                                                             5220

(A)Treating the? 7-day strength as the explanatory? variable, x, use technology to determine the estimates of ?0 and ?1.

(B) Compute the standard error of the? estimate

(C) Determine

(E) Construct a? 95% confidence interval about the slope of the true? least-squares regression line. (Lower bound, Upper bound)