User Manual

this procedure computes the mean, standard deviation, and standard error of the
mean.
1. Press CLEAR .
2. Key in the first value and press
.
3. Key in the respective frequency and press
0 . The 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
0 1 6 3 .
6. Press
to find the standard deviation.
7. Press
0 to find the standard error of the mean.
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 Display
CLEAR
190
54
0
1.00 First data pair entered.
195
32
0
2.00 Second data pair entered.
200
88
0
3.00 Third data pair entered.
206
92
0
4.00 Fourth data pair entered.
0 1 6
3
199.44 Average monthly rent.
5.97 Standard deviation.
0
0.37 Standard error of the mean.
Use the following HP-12C program for the previous example:
KEYSTROKES DISPLAY