For each value ofd.f.look up the value of Student'stin Appendix D for the stated level of confidence. How close is thet-value to the correspondingz-value (at the bottom of the column ford.f.=)?

UseAppendix Dand Excel to find the value of Student'stfor the given level of confidence.(Round your answers to 4 decimal places.)

(a-1)

d.f.= 40, 95% confidence.

The value of Student'st

(a-2)	Thez-value is close.
	Yes No

(b-1)

d.f.= 80, 95% confidence.

The value of Student'st

(b-2)	Thez-value is close.
	Yes No

(c-1)

d.f.= 100, 95% confidence.

The value of Student'st

(c-2)	Thez-value is close.
	No Yes