Page 168 - Math Grade 12 (Advance)

PROEUS DARA

~~ffitHtJH fU~ !l ± 20" = (J..L- 2cr, !l + 2cr) = (37200- 2 X 800, 37200 + 2 x 800)

= (35600, 38800)
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fEj ru~s-lm~u ±3cr 1i'!3~J'!3 '1

~~ffiti fUH fU~ !l ± 3cr = (J..L- 3cr, !l + 3cr) = (37200- 3 x 800, 37200 + 3 x 800)

= (34800, 39600)

~msg 1_Yttnru 99.73% ~sg:nROru;Jru1Ym~iltlHn5mn5Ln'!3ljn~smn~
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n. t~'tflS !l = 60 Stl a= 5 tSlH~ffitifUHfU~ J.!±O"= (60-5, 60+5)

= (55, 65)

ttrlru 68% ~Sffl~HttlG'iVltlHhlhlG'itslLHSl~ ±cr rl'\:3~1'!:3~ (J..L-0", J..L+O")
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2. J..L±2cr=(J..L-2cr, J..L+2cr)=(60-2x5, 60+2x5) =(50, 70)

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