For the data set 7, 10, 10, 14, 14, 17, the mean is 12. What is the mean absolute deviation?

The mean absolute deviation is 18.
The mean absolute deviation is 12.
The mean absolute deviation is 6.
The mean absolute deviation is 3. I NEED IT NOW!

Assemble the proof by dragging tiles to the statements and reasons column

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.

Solve the following inequalities and show the solution on a number line. 3/4 (2x-7) ≤ 5