Transcription of Summation Algebra - Statpower
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Summation Algebra - Statpower
2. Summation Algebra In the next 3 chapters, we deal with the very basic results in Summation Algebra , descriptive statistics, and matrix Algebra that are prerequisites for the study of SEM theory. You may be thoroughly familiar with this material, in which case you may merely browse through it. However, it is my experience that many students find a thorough review of these results worthwhile. SINGLE SUBSCRIPT NOTATION. Most of the calculations we perform in statistics are repetitive operations on lists of numbers. For example, we compute the sum of a set of numbers, or the sum of the squares of the numbers, in many statistical formulas.
SINGLE SUMMATION NOTATION 11 is a matrix, a rectangular array containing 3 rows and 3 columns. You count down to get to a particular row, and you count across from left to right to get
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