statistik analiz

1-misol. ko’paytmalar usulidan foydalanib quyidagi statistic taqsimotning tanlanma o’rtacha qiymatini va tanlanma dispersiyasini toping: xi 10,2+n 10,4+n 10,6+n 10,8+n 11,0+n 11,2+n 11,4+n 11,6+n 11,8+n 12,0+n ni 2+n 3+n 8+n 13+n 25+n 20+n 12+n 10+n 6+n 1+n yechish. tanlanma hajmi n=100, qadam h=0,2, soxta nol c=11,0. ko’paytmalar jadvalini tuzamiz: xi ni ui uini niui2 ni(ui+1)2 10,2 2 -4 -8 32 18 10,4 3 -3 -9 27 12 10,6 8 -2 -16 32 8 10,8 13 -1 -13 13 0 11,0 25 0 0 0 25 11,2 20 1 20 20 80 11,4 12 2 24 48 108 11,6 10 3 30 90 160 11,8 6 4 24 96 150 12,0 1 5 5 25 36 n=100 tekshirish: demak hisoblash to’g’ri bajarilgan. …

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