Texas Instruments TI-84 PLUS SILV Guidebook - Page 183
sum, prod, Sums and Products of Numeric Sequences, stdDev, variance, median
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mean(list[,freqlist]) median(list[,freqlist]) MathPrint™ Classic sum(, prod( sum( (summation) returns the sum of the elements in list. start and end are optional; they specify a range of elements. list elements can be real or complex numbers. prod( returns the product of all elements of list. start and end elements are optional; they specify a range of list elements. list elements can be real or complex numbers. sum(list[,start,end]) prod(list[,start,end]) Sums and Products of Numeric Sequences You can combine sum( or prod( with seq( to obtain: upper G expression(x) upper ∏ expression(x) x=lower x=lower To evaluate G 2(N-1) from N=1 to 4: stdDev(, variance( stdDev( returns the standard deviation of the elements in list. The default value for freqlist is 1. Each freqlist element counts the number of consecutive occurrences of the corresponding element in list. Complex lists are not valid. Chapter 11: Lists 176