Question

in a series mean = 50 and fx = 1000, find the number of terms​

Answer 1

RangeThe measure of dispersion which is easiest to understand and easiest to

calculate is the range. Range is defined as:

Range = Largest observation – Smallest observation

(b) Mean Deviation

(i) Mean deviation for ungrouped data:

For n observation x1

, x2

, ..., xn

, the mean deviation about their mean x is

given by

M.D ( x ) =

| | i

x x

n

−

(1)

Mean deviation about their median M is given by

M.D (M) =

| M | i

x

n

−

(2)

(ii) Mean deviation for discrete frequency distribution

Let the given data consist of discrete observations x1

, x2

, ... , xn

occurring with

frequencies f

1

, f

2

, ... , f

n

, respectively. In this case

Answer 2

Answer:

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