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Home / Questions / As concrete​ curesit gains strength The following data represent the​ 7-day and​ 28-day st...

As concrete​ curesit gains strength The following data represent the​ 7-day and​ 28-day strength in pounds per square inch​ of a certain type of concrete

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 β0 and β1.

(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)

Apr 08 2020 View more View Less

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