given mean 280, standard dev. 20, how good is score of 350?

[Lianne]

SUPPOSE YOU TAKE A EXAM WITH 400 POSSIBLE POINTS AND ARE TOLD THAT THE MEAN SCORE IS 280 AND THAT THE STANDARD DEVIATION IS 20. YOU ARE ALSO TOLD THAT YOU GOT 350. DID YOU DO WELL ON THE EXAM? EXPLAIN YOUR ANSWER.

ANY HELP WOUL BE APPRECIATED

 

[royhaas]

Re: HW HELP

Calculate the z-score.