Mean, Standard Deviation, Standard Error For Grouped Data - HP 12c Platinum Reference Manual

106 Statistics
ALG Mode:
5. Press gvz: 1 gr³ to obtain the standard error of the mean of the x-
values.
6. Alternatively, press gv~z: 1 gr³ to obtain the 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 per 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?
12c platinum / 12C
RPN Keystrokes
fCLEARH
190_200_
205_205_
216_220_
gÖ
gv
:1grz
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
this procedure computes the mean, standard deviation, and standard error of the mean.
1. Press f CLEAR H .
RPN Mode:
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.
ALG Mode:
2. Key in the first value and press ³ .
3. Key in the respective frequency and press ?+ 0 §~³gF~_ . The
display shows the number of data points entered.
4. Repeat steps 2 and 3 for each data point.
12c platinum
ALG Keystrokes
fCLEARH
190_200_
205_205_
216_220_
gÖ
gv
z:1gr³ 4.43
x , x
1
f , f
1
Display
Total number of inputs.
6.00
Average monthly rent.
206.00
Standard deviation.
10.86
Standard error of the mean.
, ... , x
2 n
, ... , f
2 n
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