Decide whether the following hypothesis isone-tailedortwo-tailed:

People are more altruistic when they are well rested.

Decide whether the following hypothesis isone-tailedortwo-tailed:

Consumers will buy less electronics when they are feeling unhappy.

Decide whether the following hypothesis is one-tailed or two-tailed:

The brightness of a person's shirt affects whether or not they will be hired on a job interview.