As concretecures, it gains strength. The following data represent the7-day and28-day strength in pounds per square inch(psi) of a certain type of concrete. Complete parts(a) through(f) below.

7-Day Strength(psi), x

2300

3380

3330

2890

2620

28-Day Strength(psi), y

4070

5020

4850

4620

4190

0b0= (Round to one decimal place asneeded.)

1b1= (Round to four decimal places asneeded.)

se= (Round to one decimal place asneeded.)

sb1= (Round to four decimal places asneeded.)

P-value= (Round to three decimal places asneeded.)

Lowerbound: (Round to three decimal places asneeded.)

Upperbound: (Round to three decimal places asneeded.)

(f) What is the estimated mean28-day strength of this concrete if the7-day strength is 3000psi?

(Round to two decimal places asneeded.)