Sample Standard Deviation - HP 32SII Owner's Manual

1000
{

Sample Standard Deviation

Sample standard deviation is a measure of how dispersed the data values are
about the mean. standard deviation assumes the data is a sampling of a
larger, complete set of data, and is calculated using n – 1 as a divisor.
Press
Press
The { σ } and { σ } keys in this menu are described in the next section,
"Population Standard Deviation."
Example:
Sample Standard Deviation.
Using the same process–times as in the above "mean" example, May Kitt
now wants to determine the standard deviation time (s
15.5
12.5
Calculate the standard deviation of the times. (Treat all the data as x–values.)
Keys:
{ }
15.5
9.25 10
12 8.5
{
11–6 Statistical Operations
File name 32sii-Manual-E-0424
Printed Date : 2003/4/24
4.1
}
{ } for the standard deviation of x–values.
{ } for the standard deviation of y–values.
9.25
12.0
Display:
12.5
}
Size : 17 .7 x 25.2 cm
Four data pairs accumulated.
Calculates the mean price
weighted for the quantity
purchased.
) of the process:
x
10.0
8.5
Description:
Clears the statistics registers.
Enters the first time.
Enters the remaining data; six
data points entered.
Calculates the standard deviation
time.