HP 10bII hp 10bii_user's guide_English_E_HDPMF102E11.pdf - Page 89
Example 1., Example 2., Display, Description
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Example 1. Keys: ∑x2 ⁄ n Display: 0.00 1.00 2.00 3.00 4.00 5.00 6.00 3.50 0.85 77.13 6.00 3.59 Description: Σ Example 2. 7: Statistical Calculations 89
7: Statistical Calculations
89
Example 1.
$±\DFKW±FDSWDLQ±ZDQWV±WR±GHWHUPLQH±KRZ±ORQJ±LW±WDNHV±WR±
FKDQJH±D±VDLO³±6KH±UDQGRPO\±FKRRVHV±VL[±PHPEHUV±RI±KHU±FUHZ´±REVHUYHV±
WKHP±DV±WKH\±FDUU\±RXW±WKH±VDLO±FKDQJH´±DQG±UHFRUGV±WKH±QXPEHUV±RI±
PLQXWHV±UHTXLUHGµ±»³¼´±»´±½´±¾³½¼´±¾³¼´±¾³¿¼³±&DOFXODWH±WKH±PHDQ±DQG±VDPSOH±
VWDQGDUG±GHYLDWLRQ±RI±WKH±WLPHV³±$OVR´±FDOFXODWH±WKH±URRW±PHDQ±VTXDUH´±
XVLQJ±WKH±IRUPXOD±
µ
7KH±VWDQGDUG±GHYLDWLRQV±FDOFXODWHG±E\±
±DQG±
±
±DUH±WKH±VDPSOH±VWDQGDUG±GHYLDWLRQV³±7KH\±DVVXPH±
WKDW±WKH±GDWD±LV±D±VDPSOLQJ±RI±D±ODUJHU´±FRPSOHWH±VHW±RI±GDWD³
,I±WKH±GDWD±FRQVWLWXWHV±WKH±HQWLUH±SRSXODWLRQ´±WKH±WUXH±
SRSXODWLRQ±VWDQGDUG±GHYLDWLRQV±FDQ±EH±FDOFXODWHG±E\±
SUHVVLQJ±
±DQG±
³
Example 2.
7KH±FRDFK±KDV±IRXU±QHZ±SOD\HUV±RQ±WKH±WHDP±ZLWK±KHLJKWV±RI±
¶À¾´±¶Á½´±¶¿¿´±DQG±¶Á¼±FHQWLPHWHUV±DQG±ZHLJKWV±RI±À·´±Á¶´±Á¾´±DQG±¿¿±
NLORJUDPV³±)LQG±WKH±PHDQ±DQG±SRSXODWLRQ±VWDQGDUG±GHYLDWLRQ±RI±ERWK±
WKHLU±KHLJKWV±DQG±ZHLJKWV´±WKHQ±VXP±WKH±
\
²GDWD³
Keys:
Display:
Description:
0.00
&OHDUV±VWDWLVWLFDO±UHJLVWHUV³
1.00
(QWHUV±ILUVW±WLPH³
2.00
(QWHUV±VHFRQG±WLPH³
3.00
(QWHUV±WKLUG±WLPH³
4.00
(QWHUV±IRXUWK±WLPH³
5.00
(QWHUV±ILIWK±WLPH³
6.00
(QWHUV±VL[WK±WLPH³
3.50
&DOFXODWHV±WKH±PHDQ³
0.85
&DOFXODWHV±WKH±VDPSOH±
VWDQGDUG±GHYLDWLRQ³
77.13
’LVSOD\V±
Σ
[
³
6.00
’LVSOD\V±
Q
³
3.59
&DOFXODWHV±WKH±URRW±PHDQ±
VTXDUH³
x
2
n
∕
∑