HP 12c Solutions Handbook page 109

this procedure computes the mean, standard deviation, and standard
error of the mean.
1. Press
2. Key in the first value and press
3. Key in the respective frequency and press
display shows the number of data points entered.
4. Repeat steps 2 and 3 for each data point.
5. To calculate the mean (average) press
.
6. Press
7. Press
Example 1: A survey of 266 one-bedroom apartment rentals reveals that
54 rent for $190 a month unfurnished, 32 rent for $195 per month, 88 rent
for $200 per month, and 92 rent for 206 per month. What are the average
monthly rental, the standard deviation, and the standard error of the mean?
Keystrokes
CLEAR
190
54 0
195
32 0
200
88 0
206
92 0
0 1
3
0
Use the following HP-12C program for the previous example:
KEYSTROKES
CLEAR .
to find the standard deviation.
0
Display
1.00
2.00
3.00
4.00
6
199.44
5.97
0.37
0
to find the standard error of the mean.
First data pair entered.
Second data pair entered.
Third data pair entered.
Fourth data pair entered.
Average monthly rent.
Standard deviation.
Standard error of the mean.
DISPLAY
108
.
0 . The
1 6 3