Reasearchers for a manufacture of barometers reach each of 50 barameters at the same time each day. The mean of the readings is 30.4 (inches of mercury) with a standard deviation of 0.28 inch, and appear to be normally distributed.
A. What % of the barameters read over 31.1?
B. what % of the barameters read less than 29.84?
C. The company rejects any that reads more than 1.5 standard devations above or belowthe mean. What is the critical readings will cause it to be rejected?