Question

Kya koi mujhe Iss chapter ka explanation de sakta h means solutions it's chp 18 of maths ICSE ​

Answer 1

Answer:

MEAN (AVERAGE): Mean [Ungrouped Data] – Mean of n observations, x1, x2, x3 … xn, is

Statistics Class 10 Notes Maths Chapter 14 1

MEAN [Grouped Data]: The mean for grouped data can be found by the following three methods:

(i) Direct Mean Method:

Statistics Class 10 Notes Maths Chapter 14 2

Class Mark = \frac { Upper\quad Class\quad Limit+Lower\quad Class\quad Limit }{ 2 }

Note: Frequency of a class is centred at its mid-point called class mark.

(ii) Assumed Mean Method: In this, an arbitrary mean ‘a’ is chosen which is called, ‘assumed mean’, somewhere in the middle of all the values of x.

Statistics Class 10 Notes Maths Chapter 14 3

…[where di = (xi – a)]

(iii) Step Deviation Method:

Statistics Class 10 Notes Maths Chapter 14 4

….. [where { u }_{ i }=\frac { { d }_{ i } }{ h } , where h is a common divisor of di]

Answer 2

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