sufficiency

Description In statistics, a sufficient statistic is a statistic which has the property of sufficiency with respect to a statistical model and its associated unknown parameter, meaning that "no other statistic which can be calculated from the same sample provides any additional information as to...

Question: In which year was Rahul born ? Statements: Rahul at present is 25 years younger to his mother. Rahul's brother, who was born in 1964, is 35 years younger to his mother. A. I alone is sufficient while II alone is not sufficient B. II alone is sufficient while I alone is not sufficient...

What is the average (arithmetic mean) of x,y and z? 1) 3x-2y+7z = 23 2) 4x-3y+5z = 5 and -x+6y-2z = 58

If wxyz does not equal 0, is w/x > y/z? (1) wz>xy (2) xz>0

Quick Tips for Data Sufficiency Memorize the four answer choices; they're the same for each and every Data Sufficiency question.Be careful not to carry over any information from one numbered statement to another...