HP 10BII Owner's Manual page 88

Keys | Description | OS to Display
Population standard Population standard
deviation of the x- deviation of the y-values
values.* if you entered y-data.*
x-value Estimate of y fora given | Slope (m) of calculated
value of x. line.
calculated line. calculated line.
"The sample standard deviation assumes that the data is a sampling of a larger, complete set of dara. The
j o n standard deviation assumes that the data constitutes the entire population.
T "The correlation coefficient is a number in the range -1 through +1 that measures how closely the data fits the
calculated line. A value of +1 indicates a perfect pote correlation, and =} indicates a perfect negative
correlation. А value close to zero indicates the line is a poor fit.
Description
Number of data points entered.
Sum of the x-values.
Sum of the y-values.
Sum of the squares of the x-values.
Sum of the squares of the j-values.
Sum of the products of the x- and _y-values.
Mean, Standard Deviations, and Summation
Statistics
You can calculate the mean (X), sample standard deviation
(S,), and population standard deviation (0), and
summation statistics, л, Zx, and Ex? of x-data. For x,y data,
you can also calculate the mean, sample standard
deviation, and population standard deviation of the y-data
and the summation statistics Ly Ly', and Xxx
88 7: Statistical Calculations