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Whenever a lower-tail test of...

Whenever a lower-tail test of the mean is being conducted, the critical region under the normal curve is the area under the curve that is located

a.to the right of -Zcutoff.

b.to the left of -Zcutoff.

c.between 0 and -Zcutoff.

d.between -Zcutoff and +Zcutoff.

a.to the right of -Zcutoff.

b.to the left of -Zcutoff.

c.between 0 and -Zcutoff.

d.between -Zcutoff and +Zcutoff.

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