Take another look at the table of estimation results for the previous Comprehension Assessment.

Compute the tStat for the following null hypothesis: H₀: b=0.

Compute the tStat for the following null hypothesis: H₀: a₁=0.

Parameter	Coefficient	SE	95% CIE LowerLimit	95% CIE UpperLimit
c	0.012	0.001	0.010	0.014
b	-0.601	0.150	-0.898	-0.304
a1	0.023	0.097	-0.169	0.215
a2	0.173	0.026	0.122	0.224
a3	0.052	0.019	0.014	0.090