Population standard deviation, Linear regression – HP 32SII User Manual
Page 155
Statistical
Operations
11–7
File name 32sii-Manual-E-0424
Printed Date : 2003/4/24 Size : 17.7 x 25.2 cm
Population Standard Deviation
Population standard deviation is a measure of how dispersed the data values
are about the mean. Population standard deviation assumes the data
constitutes the complete set of data, and is calculated using n as a divisor.
Press
{
2
{
σº
} for the population standard deviation of the
x–values.
Press
{
2
{
σ¸
} for the population standard deviation of the
y–values.
Example:
Population Standard Deviation.
Grandma Tinkle has four grown sons with heights of 170, 173, 174, and
180 cm. Find the population standard deviation of their heights.
Keys: Display: Description:
z
b
{
´
}
Clears the statistics registers.
170
6
173
6
174
6
180
6
)
Enters data.
{
2
{
σº
}
)
Four data points accumulated.
)
Calculates the population
standard deviation.
Linear regression
Linear regression, L.R. (also called linear estimation) is a statistical method for
finding a straight line that best fits a set of x,y–data.
Note
To avoid a
!!
message, enter your data before
executing any of the functions in the L.R. menu.