Page 147 - Bangladesh_classwiz_BOOK2018_rev_Neat

aiv hvK, ‡Kv‡bv ‡gŠmy‡gi Rvbyqvwi gv‡mi 31 w`‡bi me©wbgœ ZvcgvÎv (‡mjwmqvm) wb‡P ‡`qv
n‡jv|

14°, 14°, 14°, 13°, 12°, 13°, 10°, 10°, 11°, 12°, 11°, 10°, 9°, 8°, 9°, 11°, 10°, 10°, 8°, 9°, 7°,
6°, 6°, 6°, 6°, 7°, 8°, 9°, 9°, 8°, 7°

gvb¸‡jv K¨vjKy‡jUi Gi Kjv‡g cÖ‡ek Kiv‡Z n‡e| g‡b ivL‡Z n‡e, gvb ‡`Iqvi ci cÖ‡Z¨K evi = evUb
Pvc‡Z n‡e|

gvb¸‡jv cÖ‡ek Kiv‡bvi mgq hw` f~j nq, Zvn‡j ERevUb ‡P‡c, gvb¸‡jv ‡PK K‡i ‡bqv hvq| hw` f~j n‡q

_v‡K, Z‡e, ‡h RvqMvq f~j n‡q‡Q, ‡mLv‡b Kvm©viwU wb‡q mwVK gvbwU w`‡q = evUb Pvc‡Z n‡e| Gici CevUb
Pvc‡Z n‡e Ges wb‡gœv³ wPÎ ‡`Lv hv‡e|

‡Kv‡bvfv‡eB Statistics Mode Z¨vM Kiv hv‡e bv, Zvn‡j me¸‡jv WvUv gy‡Q hv‡e, ‡m‡¶‡Î Avevi bZyb K‡i

w6 evUb ‡P‡c ïiæ Ki‡Z n‡e| Gici cwimsL¨vb Gi wewfbœ gvb ‡ei Kivi Rb¨ T evUb Pvc‡Z n‡e
Ges me¸‡jv option ‡`Lvi Rb¨ RevUb Pvc‡Z n‡e| w¯Œb¸‡jv Dc‡ii 2q I 3q wP‡Î ‡`Lv‡bv n‡jv|

GLb 2(1-Variable Calc) evUb Pvc‡j GK Pj‡Ki me¸‡jv djvdj ‡`Lv hv‡e| Gici 3wU w¯Œb Avm‡e, hv

‡`Lvi Rb¨ R evUb Pvc‡Z n‡e| w¯Œbmg~n wb‡Pi wP‡Î ‡`Lv‡bv n‡jv,

̅
̅
cÖ_‡gB cvIqv hv‡e hv Mogvb cÖKvk K‡i, GLv‡b = 9.580645161, Zvn‡j ejv hvq, D³ ‡gŠmy‡gi
Rvbyqvwi gv‡mi Mo ZvcgvÎv 9.580645161; (‡mjwmqvm) GQvov Rvbqvwi gv‡mi me©‡gvU ZvcgvÎv ∑ ‡_‡K
y
cvIqv hvq| ∑ Gi ‡_‡K Mo gvb cvIqv hvq|

̅
= ∑ = 297 = 9.58064;
31
2q w¯Œb Gi Gi gvb †_‡K eySv hvq, 31wU gvb Av‡Q A_©vr 31 w`‡bi ZvcgvÎv cÖ‡ek Kiv‡bv n‡q‡Q| min Ges
max †_‡K me©wb¤œ Ges m‡e©v”P ZvcgvÎv cvIqv hvq, hv G‡¶‡Î h_vµ‡g 6° Ges 14° w¯Œ‡b Av‡iv A‡bK ¸‡jv
gvb †`Lv hvq, ‡hgb

= 5.920915713, hv †f`v¼ (Variance)
2

= 2.433293183, hv cwiwg‡Zv e¨eavb (Standard Deviation)

2
= 6.11827957, hv DcvË n‡Z †f`v¼ (Variance from the sample)

= 2.47351563, hv DcvË n‡Z cwiwg‡Zv e¨eavb (Standard Deviation from the Sample)

142