In hierdie les hersien ons slegs die graad 11 variansie en ... - AdMaths
In hierdie les hersien ons slegs die graad 11 variansie en ... - AdMaths
In hierdie les hersien ons slegs die graad 11 variansie en ... - AdMaths
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Variance ( 2 ) =<br />
GR. 12 THIRD PAPER<br />
DATA HANDLING (STATISTICS)<br />
VARIANCE AND STANDARD DEVIATION I<br />
LESSON 3<br />
=<br />
Page 8 of <strong>11</strong><br />
2<br />
( x – x )<br />
n<br />
2222,<br />
84<br />
6<br />
= 370,47 sec 2<br />
This causes a problem, because the unit for reaction time is now sec 2 !<br />
Gr. 12B<br />
Data (x) x – x (x – x ) 2<br />
58 -0,8 0,64<br />
59 0,2 0,04<br />
45 -13,8 190,44<br />
56 -2,8 7,84<br />
69 10,2 104,04<br />
66 7,2 51,84<br />
Sum 354,84<br />
Variance ( 2 ) =<br />
=<br />
2<br />
( x – x )<br />
n<br />
354,<br />
84<br />
6<br />
= 59,14 sec 2
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