Q. 10 D4.1( 9 Votes )

# If <span la

Answer :

Given that, …(i)

∑f_{i}u_{i} = 20

∑f_{i} = 100

From the step deviation method, we have the relation of deviation (u_{i}) and assumed mean (A).

Comparing it with equation (i),

A = 25

h = 10

Using the formula of step deviation method, we have

⇒

⇒ Mean = 25 + 2

⇒ Mean = 27

To find modal class, we need to find frequencies of the data given.

Note the greatest frequency in the data.

So, greatest frequency = 30

Thus, the corresponding class is 30 – 40.

⇒ Modal class = 30 – 40

**Thus, mean is 27 and modal class is 30 – 40.**

Rate this question :

Paid amounts of aWest Bengal Board - Mathematics

The frequency disWest Bengal Board - Mathematics

Let us find the mWest Bengal Board - Mathematics

Let us find the mWest Bengal Board - Mathematics

Heights (cm) of sWest Bengal Board - Mathematics

If <span laWest Bengal Board - Mathematics

Let us see the frWest Bengal Board - Mathematics

The following freWest Bengal Board - Mathematics

Let us find the mWest Bengal Board - Mathematics

Let us find the mWest Bengal Board - Mathematics