Question

While calculating mean of a grouped frequency distribution, step deviation method was used `((x - a)/h = u)`. It was found that `barx = 64`, h = 5 and a = 62.5. The value of `baru` is ______.

Options

• 0.5

• 1.5

• 0.3

• 7.5

Answer 1

hile calculating mean of a grouped frequency distribution, step deviation method was used `((x - a)/h = u)`. It was found that `barx = 64`, h = 5 and a = 62.5. The value of `baru` is 0.3.

Explanation:

Given:

`barx = 64`

a = 62.5

h = 5

Substitute these into the formula:

`barx = a + hbaru`

`64 + 62.5 + 5baru`

`64 - 62.5 = 5baru`

`1.5 = 5baru`

`baru = 1.5/5`

`baru = 0.3`