A set of exam marks has mean 70, median 65, inter-quartile range 25 and standard deviation 15 marks. It is decided to subtract 10 from all the marks. For the new set of marks,
i) what is the new mean?
ii) what is the new median?
I
iii) what is the new inter-quartile range?
iv) what is the new standard deviation?

An attorney came to work on a saturday. when he signed in, he was advised by the morning security guard employed by the building management that he must be out of the building by 5 p.m., when it closes. however, he stayed past 5 p.m. to complete a brief that had to be filed on monday morning. at 5: 15 p.m., the afternoon security guard set the locks on all the doors of the building and left. because she was in a hurry, she did not check the sign-in sheet to make sure that everyone had signed out, contrary to mandatory procedures. when the attorney tried to exit 15 minutes later, he discovered that the doors were all locked and could not be opened from the inside. he used his cell phone to call for , and a supervisor from the building arrived and let him out shortly thereafter. if the attorney sues the building management for false imprisonment, is he likely to win?