find out the Range coefficient of the range marks number of students 20-29 8 30-39

Question

find out the Range coefficient of the range

marks number of students
20-29 8
30-39 12
40-49 20
50-59 7
60-69 3​

in progress 0
Khoii Minh 4 years 2021-08-06T21:44:03+00:00 1 Answers 13 views 0

Answers ( )

  1. Jezebel
    0
    2021-08-06T21:45:21+00:00
    Reply

    Answer:

    0.4494

    Step-by-step explanation:

    Given :

    marks number of students

    20-29 8

    30-39 12

    40-49 20

    50-59 7

    60-69 3​

    The range Coefficient is obtained thus :

    Range Coefficient = (Xm – Xl) / (Xm + Xl)

    Where ;

    Xm = Mid value of highest class = (60+69)/2 = 64.5

    Xl = Mid value of lowest class = (20+29)/2 = 24.5

    Range Coefficient = (64.5 – 24.5) / (64.5 + 24.5)

    Range Coefficient = 40 / 89 = 0.4494

Leave an answer

Browse

Giải phương trình 1 ẩn: x + 2 - 2(x + 1) = -x . Hỏi x = ? ( )