If xi's are the class marks of the class-intervals of grouped data, fi's are the corresponding frequencies and x̄ is the mean, then Σ fi(xi − x̄) is equal to : 1. −1 2. 0 3. 1 4. 2

Question

KnowledgeBoat · Accepted Answer

Given, We know that, Substituting the values in equation (1), we get : Hence, option 2 is the correct option.

Mathematics

If x_i's are the class marks of the class-intervals of grouped data, f_i's are the corresponding frequencies and x̄ is the mean, then Σ f_i(x_i − x̄) is equal to :
−1
0
1
2

Measures of Central Tendency

Related Questions

In a class of 100 students, the mean marks obtained in a certain test is 30 and in another class of 50 students the mean marks obtained in the same test is 60. The mean marks obtained by the students of both the classes taken together is :
40
45
48
50

Mathematics

If xi's are the class marks of the class-intervals of grouped data, fi's are the corresponding frequencies and x̄ is the mean, then Σ fi(xi − x̄) is equal to :−1012

Measures of Central Tendency

Related Questions

In a class of 100 students, the mean marks obtained in a certain test is 30 and in another class of 50 students the mean marks obtained in the same test is 60. The mean marks obtained by the students of both the classes taken together is :40454850

If x_i's are the class marks of the class-intervals of grouped data, f_i's are the corresponding frequencies and x̄ is the mean, then Σ f_i(x_i − x̄) is equal to :
−1
0
1
2

In a class of 100 students, the mean marks obtained in a certain test is 30 and in another class of 50 students the mean marks obtained in the same test is 60. The mean marks obtained by the students of both the classes taken together is :
40
45
48
50