Tabitha drew the number line below and labeled Point T to represent 1 3 over 4. Then Tabitha wrote an equation under the number line to represent 1 3 over 4.

An automated water dispenser fills packets with one liter of water on average, with a standard deviation of 5 milliliter. the manual says that after a year of operation the dispenser should be tested to see if it needs recalibration. a year later a number of filled packets are set aside and measured separately. it is found that the average packet now contains about 0.995 liters. does the dispenser need calibration? explain your answer.