Home UP BOARD Question Papers NCERT Solutions CBSE Papers CBSE Notes NCERT Books Motivational

notes for Class 10 STATISTICS math Download PDF

Notes For Class 10 STATISTICS Math Download PDF

hapter 14 : STATISTICS

NCERT Notes For Class 10 Maths

Chapter 14 : STATISTICS

KEY POINTS

The three measures of central tendency are :
i. Mean
ii. Median
iii. Mode
• Mean Of grouped frequency distribution can be calculated by the following methods.

Direct Method
Direct Method

Where Xi is the class mark of the ith class interval and fi frequency of that class

Assumed Mean method or Shortcut method
Assumed Mean method or Shortcut method

Where a = assumed mean
And di = Xi - a

Step deviation method
Step deviation method

Where a = assumed mean
h = class size
And ui = (Xi – a)/h

• Median of a grouped frequency distribution can be calculated by

Where
l = lower limit of median class
n = number of observations
cf = cumulative frequency of class preceding the median class
f = frequency of median class
h = class size of the median class.

• Mode of grouped data can be calculated by the following formula.

Where
l = lower limit of modal class
h = size of class interval
f1 = Frequency of the modal class
fo = frequency of class preceding the modal class
f2= frequency of class succeeding the modal class

•Empirical relationship between the three measures of central tendency.
3 Median = Mode + 2 Mean
Or, Mode = 3 Median – 2 Mean

• Ogive
Ogive is the graphical representation of the cumulative frequency distribution. It is of two types:
(i) Less than type ogive.
(ii) More than type ogive

• Median by graphical method
The x-coordinated of the point of intersection of ‘less than ogive’ and ‘more than ogive’ gives the
median.


Notes STATISTICS Download PDF


Please send your queries to ncerthelp@gmail.com you can aslo visit our facebook page to get quick help. Link of our facebook page is given in sidebar


Class and Subject List

Ncert Solution for class 6 to 12 download in pdf

CBSE Model test papars Download in pdf

NCERT Books Free Pdf Download for Class 5, 6, 7, 8, 9, 10 , 11, 12 Hindi and English Medium

Mathematics Biology Psychology
Chemistry English Economics
Sociology Hindi Business Studies
Geography Science Political Science
Statistics Physics Accountancy

CBSE Syllabus Class 6 to 9, 10, 11, 12 Maths, Science, Hindi, English ...

Last year CBSE Question paper for Class 6 to 9, 10, 11, 12 Maths, Science, Hindi, English ...

Important Links

Follow Us On

Face book page ncerthelp twitter page youtube page linkdin page

NCERT CBSE News

NCERT CBSE News

Please Share this webpage on facebook, whatsapp, linkdin and twitter.

Facebook Twitter whatsapp Linkdin

Copyright @ ncerthelp.com A free educational website for CBSE, ICSE and UP board.