HP F2216A hp 33s_user's manual_English_E_HDPM20PIE56.pdf - Page 156
Statistics Registers, Register, Number, Description, Similarly, you can press
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Statistics Registers Register n Σx Σy Σx2 Σy2 Σxy Number 28 29 30 31 32 33 Description Number of accumulated data pairs. Sum of accumulated x-values. Sum of accumulated y-values. Sum of squares of accumulated x-values. Sum of squares of accumulated y-values. Sum of products of accumulated x- and y-values. You can load a statistics register with a summation by storing the number (28 through 33) of the register you want in i (number I ) and then storing the summation (value I ). Similarly, you can press | to view a register value - the display is labeled with the register name. The SUMS menu contains functions for recalling the register values. See "Indirectly Addressing Variables and Labels" in chapter 13 for more information. 11-12 Statistical Operations