Mean, Standard Deviation, Standard Error For Grouped Data - HP 12c Solutions Handbook

1. Press
2. If you are summing one set of numbers, key in the first number and press
. Continue until you have entered all of the values.
3. If you are summing two sets of numbers, key in the y-value and press
, key in the x-value and press
entered all of the values.
4. Press
5. Press
mean of the x-values.
6. Alternatively, press
standard error for the mean of the y-values.
Example: A sample of 6 one-bedroom apartment rentals reveals that one
rents for $190 per month unfurnished, one rents for $200 pre month, two
rent for $205 per month, one rents for $216 per month, and one rents for
$220 per month. What are the mean monthly rental and the standard
deviation? What is the standard error of the mean?
Keystrokes
CLEAR
190 200
205 205
220
1
Mean, Standard Deviation, Standard Error for
Grouped Data
Grouped data are presented in frequency distributions to save time and
effort in writing down (or entering) each observation individually. Given a
set of data points
with respective frequencies
CLEAR .
to obtain the mean of the x-values.
1
Display
6.00
216
206.00
10.86
4.43
x
1
f
. Continue until you have
to obtain the standard error of the
1
Total number of inputs.
Average monthly rent.
Standard deviation.
Standard error of the mean.
, x , ... , x
2 n
, f , ... , f
1 2 n
107
to obtain the