HP 10B - Manual (Page 92)

Keys Description
(RCLl 4 (n) Number of data points entered.
fRCLl5(E)i) Sum of the x-values.
(R^6(i:y) Sum of the y-values.
RCL17(D<2) Sum of the squares of the x-values.
(RcOsoy) Sum of the squares of the y-values.
fRcqgiExy)
Sum of the products of the x- and y-values.
Mean, Standard Deviations, and Summation
Statistics
OOOOOl
OOOOOO^
CZDOOOg
oSSSo
oooDc:
You can calculate the mean (7), sample standard deviation
(Sx), and population standard deviation and summation
statistics, n, Ec, and Ev^ of.v-data. r o r x y data, you can also
calculate the mean, sample standard deviation, and popula­
tion standard deviation of they-data and the summation
statistics X3y, Ey^, and Ety.
Example 1
. A yacht captain wants to determine how long it takes to
change a sail. She randomly chooses six members of her crew, observes
them as they carry out the sail change, and records the number of minutes
required: 4.5, 4,2, 3.25, 3.5, 3.75. Calculate the mean and sample standard
deviation of the times. Also, calculate the root mean .square, u.sing the
formula V^Ex’V'» :
Keys:
■(cOl
Display:
0.00
Description:
Clears statistical
registers.
7: Statistical Calculations 89