Question

# 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 β0SUMMARY OUTPUT

Regression Statistics

Multiple R

0 9670

R square

0.9351

Adjusted R Square

0.9134

Standard Error

150.587 7

Observations

ANOVA

of

35

MS

significance F

Regression

979770 979770 43. 2061…

Statistics and Probability