Estimate

Std. Error

t

value

Pr (>|t|)

a0

3.391e−04

7.359e−05

4.608

4.08e−06^***

a1

7.939e−02

4.884e−02

1.626

0.046^*

b1

2.499e−01

1.627e−01

1.535

0.002^***