HP 12C Financial calculator - Manual (Page 82)

82 Section 6: Statistics Functions
File name: hp 12c_user's guide_English_HDPMBF12E44 Page: 82 of 209
Printered Date: 2005/7/29 Dimension: 14.8 cm x 21 cm
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g 1.19 Weighted mean cost per gallon.
A procedure for calculating the standard deviation and standard error (as well as
the mean) of weighted or grouped data is included in the hp 12c Solutions
Handbook.