Find the level of a two-sided confidence interval that is based on the given value of and the given sample size.

a. t=2.776, sample size 5.
b. t=2.718, sample size 12.
c. t=5.841, sample size 4.
d. t=1.325, sample size 21.
e. t=1.746, sample size 17.


(a) 95%

(b) 98%

(c) 99%

(d) 80%

(e) 90%

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Mild steel weld coupons can have the welds removed using an OFC torch, but welds on stainless and aluminum coupons will have to be cut out with a(n) ____________________ torch.

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Technician A says that all injectors in a sequential fuel injection system often use the same power wire. Technician B says that each injector in a sequential fuel injection system should have a different ground wire. Which technician is correct?

A) Technician A only B) Technician B only C) Both technicians A and B D) Neither technician A nor B

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