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.

7-Day_Strength_(psi)_-_x 28-Day_Strength_(psi)_-_y

3380 5020

2890 4620

3330 4850

2480 4120

3390 5220

Use technology to find the estimates of 0 and 1.

0 b0 =

1 b1 =

Compute the standard error of the estimate, se

se=

Determine the P value of this hypothesis test

P value=

Construct a 95% confidence interval about the slope of the trust least-squares regression line

Lower Bound=

Upper Bound=

What is the estimated mean 28 day strength of this concrete if the 7 day strength is 3000psi?

a good estimate of the mean 28-day strength is ___ psi?