Statistics, Data Analysis and Probability for Grade 12, Problem ID: 9005
Statement [1] is correct. The big sigma on the left is a summation sign commonly used in mathematics and physics.
Statement [2] is also correct.
We then ask the apparently simply question: Is statement [3] correct?
by Leslie Green
No, the right-hand-side is twice as large.Non-obviously, no.Yes, but it is quite difficult.Obviously, yes.