• Requires RPNCalcSeries to run. Please, download a trial at www.handango.com • The text below is a substratum of the on-line help guide: - This program calculates means, standard deviations, covariance, correlation coefficient, coefficients of variation, sums of data points, sum of multiplication of data points, and sums of squares of data points derived from a set of ungrouped data points {(Xi, Yi), i=1, 2, ..., n}, or grouped data points {(Xi, Yi, fi), i=1, 2, ..., n}, where fi denotes the frequency of repetition of (Xi, Yi).
- The calculation could be done, based either on ''n'' or ''n-1'' sample number of elements. ... 2.2) Function Keys - Function Keys correspond to the 16 keys placed at the 3rd and 4th rows just below the calculator display. Help is available for each key. Just tap the respective button, labeled from ''A'' to ''P'', in the upper part of this screen. To return to this page, tap the key [pgm] below. Below is a map of the statistics functions assigned to each Function Key: - [A] -> initialize. It clears statistics registers
- [B] -> calculate means: X
- [C] -> calculate means: Y
- [D] -> calculate standard deviation: Sx
- [E] -> calculate standard deviation: Sy
- [F] -> calculate covariance: Sxy
- [G] ->
- [H] -> calculate sums: sum(Xi), sum(Yi), sum(XiYi)
- [I] -> ungrouped data points, data entry (+)
- [J] -> ungrouped data points data entry (-) -> for correction
- [K] -> grouped data points data entry (+)
- [L] -> grouped data points data entry (-) for correction
- [M] -> calculate coefficient of variation: Vx
- [N] -> calculate coefficient of variation: Vy
- [O] -> calculate correlation coefficient: Vxy
- [P] -> calculate sum of squares: sum(X²i), sum(Y²i), sum(XiYi) 3) Examples 3.1) For the following set of data, find the means, standard deviations, covariance, correlation coefficient, coefficients of variation and the sums. Xi: 26 30 44 50 62 68 74
Yi: 92 85 78 81 54 51 40 keystrokes:
-> [A] - initialize
-> 26 [Ent] 92 [I]
-> 100 [Ent] 100 [I] -> oops an error
-> 100 [Ent] 100 [J] -> correction
-> 30 [Ent] 85 [I]
-> 44 [Ent] 78 [I]
-> 50 [Ent] 81 [I]
-> 62 [Ent] 54 [I]
-> 68 [Ent] 51 [I]
-> 74 [Ent] 40 [I]
-> [Stt1] toggle to "n"
-> [B] -> calculate means X = 50,57
-> [C] -> calculate means Y = 68,71
-> [D] -> calculate Sx = 18,50
-> [E] -> calculate Sy = 19,99
-> [F] -> calculate Sxy = -354,14
-> [M] -> calculate Vx = 36,58
-> [N] -> calculate Vy = 29,10
-> [O] -> calculate Vxy = -0,95
-> [H] -> calculate sum(Xi) = 354,00, sum(Yi) = 481,00
-> [P] -> calculate sum(X²i) = 19956,00, sum(Y²i) = 35451,00 and sum(XiYi) = 22200,00
-> [Stt1] -> toggle to "n-1"
-> [D] -> calculate Sx = 17,12
-> [E] -> calculate Sy = 18,51
-> [F] -> calculate Sxy = -303,55
-> [M] -> calculate Vx = 33,87
-> [N] -> calculate Vy = 26,94
-> [O] -> calculate Vxy = -0,95