HP 40G manual Computed statistics, One-variable, Statistic Definition

Computed statistics

One-variable

Statistic	Definition
NΣ	Number of data points.
TOTΣ	Sum of data values (with their
	frequencies).
MEANΣ	Mean value of data set.
PVARΣ	Population variance of data set.
SVARΣ	Sample variance of data set.
PSDEV	Population standard deviation of data
	set.
SSDEV	Sample standard deviation of data set.
MINΣ	Minimum data value in data set.
Q1	First quartile: median of ordinals to
	left of median.
MEDIAN	Median value of data set.
Q3	Third quartile: median of ordinals to
	right of median.
MAXΣ	Maximum data value in data set.

When the data set contains an odd number of values, the data set’s median value is not used when calculating Q1 and Q3 in the table above. For example, for the following data set:

{3,5,7,8,15,16,17}

only the first three items, 3, 5, and 7 are used to calculate Q1, and only the last three terms, 15, 16, and 17 are used to calculate Q3.

Statistics aplet 8-13