GRAVETTER_CH01_STATISTICAL NOTATION

Question 1

What is the symbol used for summation?

Answer 1

The Greek letter sigma Σ

Question 2

THINK! What is the order of mathematical operations?

Answer 2

1. Any calculation contained within parentheses;
2. Squaring (or raising to other exponents);
3. Multiplying and/or dividing. A series of multiplication and/or division operations should be done in order from left to right.
4. Summation using the Σ notation.
5. Any other addition and/or subtraction.