by a normal probability distribution?

i am study in England. Sometimes i have terrible in statistic..

I have some question.I can say its not my homework..Just for practise just in casehttp://www.talkstats.com/images/smilies/smile.gif

Its in the my text book..

A mutual fund calculates its annualized total return at the end of every business day. Over a 10 year period, these returns are found to be normally distributed with a mean of 14% and a standard deviation of 20%. On any given business day, what is the probability that the annualized total return of the mutual fund is negative?

Which of the following definitely CAN NOT be described by a normal probability distribution?

Question 5 answers

number1--The number of patients arriving at an emergency room in any given day if the average number of arrivals per day is known.

number2--The resting pulse rates of the female donors visting a blood bank in a one-year period.

number3--The acutal weight contained in 1,000 one pound packages of ground beef inspected by the Department of Agriculture.

number5--The means of 100 random samples of 12 units each all selected from the same population.

Last one is my special questionhttp://www.talkstats.com/images/smilies/smile.gif

process might be out of control even if all the points on the x-bar control chart lie between the UCL and LCL.

what are you think about that ? is that true?