Atest is being conducted to test the difference between two population means using data that are gathered from a matched pairs experiment. if the paired differences are normal, then the distribution used for testing is the:

the answer would be 0.54

answer: 4  

the square root of 16 is 4. it is a very simple mathematic concept. a square root when a number multiplied by itself will result in a number. here, the number 16 comes when 4 is multiplied by 4. hence the square root of 16 is 4. you can always figure out a square root by the inverse operation of squaring.