Question 02. In calculating the mean of grouped data, grouped in classes of equal width, we may use the formula, ¯x=a+∑fidi∑fi where, a is the assumed mean, a must be one of the mid - point of classes. Is the last statement correct ? Justify your answer.

Question 02. In calculating the mean of grouped data, grouped in class

1.	Question 02. In calculating the mean of grouped data, grouped in classes of equal width, we may use the formula, ¯x=a+∑fidi∑fi where, a is the assumed mean, a must be one of the mid - point of classes. Is the last statement correct ? Justify your answer.
Answer» Question 02. In calculating the mean of grouped data, grouped in classes of equal width, we may use the formula, $¯ x = a + \frac{\sum f_{i} d_{i}}{\sum f_{i}}$ where, a is the assumed mean, a must be one of the mid - point of classes. Is the last statement correct ? Justify your answer.

Discussion

No Comment Found

Related InterviewSolutions

A ladder of length 6 metres makes an angle of 45° with the floor while leaning against one wall of a room. If the foot of the ladder is kept fixed on the floor and it is made to lean against the opposite wall of the room, it makes an angle of 60° with the floor. Find the distance between two walls of the room. [CBSE 2011]
12. The height of a building is one-third of the height of telephone exchange tower standing on it . If the angle of elevation of the top of the building when seen from a point on the ground is 30^° , then find the tangent of angle of elevation of the top of the telephone exchange tower when seen from the same point .
Question 5 In the following question out of the four options only one is correct, write the correct answer: If 5x3−4=2x5, then the numerical value of 2x-7 is: (a) 1913 (b) −1319 (c) 0 (d) 1319
In figure displayed below, if TP and TQ are the two tangents to a circle with centre O so that ∠POQ=110∘, then ∠PTQ is equal to
In the given figure, if ∠OAB=40∘, then ∠ACB = ___.
1. From a point 100 metre above a lake the angle of elevation of a stationary helicopter is 30^° and the angle of depression of reflection of the helicopter in the lake is 60 degree. Find the height of the helicopter above the lake.
If A and B are any two events having P(A∪B)=12 and P(A)=23 then probability of A ∩ B is (a) 12 (b) 23 (c) 16 (d) 13
For the given linear equation x−2y=1, match the different x values with their corresponding y values.
Let A be a square matrix of order n such that det(A)=10 and det(2A)2=40. Then the order of A is[1 mark]
A tangent is a secant with which of the following properties?

Question 02. In calculating the mean of grouped data, grouped in classes of equal width, we may use the formula, ¯x=a+∑fidi∑fi where, a is the assumed mean, a must be one of the mid - point of classes. Is the last statement correct ? Justify your answer.

Discussion

No Comment Found

Related InterviewSolutions

Reply to Comment