Tally

Tally

When counting the values of a statistical variable, the number of values that corresponds to a given characteristic or that belongs to a particular class of values.

(A) If the characteristic studied is discrete, the tally of a value x of this characteristic is the number of individuals for which the value of the characteristic is x.

Example

DISTRIBUTION IN A CLASS OF 40 STUDENTS

Boys Girls TOTAL
Wears glasses 13 8 21
Do not wear glasses 9 10 19
TOTAL 22 18 40

Total tally: 40 students
Partial tally of boys: 22 students
Partial tally of girls: 18 students
Partial tally of students who wear glasses: 21 students
Partial tally of girls who wear glasses: 8 students


(B) If the characteristic studied is continuous, the tally of a class C is the number n of individuals for which the value of the characteristic belongs to the class C.

Exemple

DISTRIBUTION IN A CLASS OF 40 STUDENTS

Height (cm)/
Mass(kg)
[120, 130[ [130, 140[ [140, 150[ [150, 160[ [160, 170[ TOTAL
[45, 55[ 6 4 3 0 1 14
[55, 65[ 4 3 5 2 0 14
[65, 75[ 2 2 5 1 2 12
TOTAL 12 9 13 3 3 40

Total tally: 40 students
Partial tally of the group of students whose mass is located in the interval [140, 150[ is 13 students
Partial tally of the group of students whose height is located in the interval [65, 75[ is 12 students
The partial tally of the group of students whose mass belongs in the interval [140, 150[ and whose height belongs to the interval [65, 75[ is 5 students

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