Apa varian dari rangkaian angka berikut ?: {12, 19,19, 19, 20, 20, 21, 21, 21, 22, 22, 22, 22, 22, 22, 22, 23, 23, 23, 24 , 25, 26, 26, 27, 27, 28, 32}

Apa varian dari rangkaian angka berikut ?: {12, 19,19, 19, 20, 20, 21, 21, 21, 22, 22, 22, 22, 22, 22, 22, 23, 23, 23, 24 , 25, 26, 26, 27, 27, 28, 32}
Anonim

Menjawab:

Varians (Populasi): # sigma ^ 2 ~~ 20.9 #

Penjelasan:

Varians populasi (#color (black) (sigma ^ 2 #) adalah rata-rata kuadrat dari perbedaan antara setiap item data populasi dan rata-rata populasi.

Untuk populasi # {d_1, d_2, d_3, …} # ukuran # n #

dengan nilai rata-rata # mu #

# sigma ^ 2 = (jumlah (d_i - mu) ^ 2) / n #