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