HP 40gs hp 40gs_user's guide_English_E_HDPMSG40E07A.pdf - Page 119
Plotting
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hp40g+.book Page 15 Friday, December 9, 2005 1:03 AM Two-variable Plotting Statistic MEANX ΣX ΣX2 MEANY ΣY ΣY2 ΣXY SCOV PCOV CORR RELERR Definition Mean of x- (independent) values. Sum of x-values. Sum of x2-values. Mean of y- (dependent) values. Sum of y-values. Sum of y2-values. Sum of each xy. Sample covariance of independent and dependent data columns. Population covariance of independent and dependent data columns Correlation coefficient of the independent and dependent data columns for a linear fit only (regardless of the Fit chosen). Returns a value from 0 to 1, where 1 is the best fit. The relative error for the selected fit. Provides a measure of accuracy for the fit. You can plot: • histograms ( ) • box-and-whisker plots ( ) • scatter plots ( ). Once you have entered your data ( ), defined your data set ( ), and defined your Fit model for two- variable statistics ( SETUP-SYMB), you can plot your data. You can plot up to five scatter or box-and-whisker plots at a time. You can plot only one histogram at a time. Statistics aplet 10-15