You examine the effect of drought on plant growth. You take…

You examine the effect of drought on plant growth. You take 20 tomato seedlings and expose each of them to an increasing level of drought (each plant gets successively less water). After two weeks you measure plant weight and amount of water. How would you analyze this problem?

A new virus is suspected of affecting men more often than wo…

A new virus is suspected of affecting men more often than women.  You take a sample of 34 men and 29 women who were exposed to the virus.  You find 19 men have the virus, and 11 women have the virus.  To analyze this problem would you pick a one or two sided test?