Statistics-Maths-Class 10
- Author:
- AMBIK BARAL
Introduction ( 1+2+4 = 7 Marks in SEE)
For continuous series( or Grouped data)
1. Arithmetic mean
For continuous series( or Grouped data)
Direct method
Where,
Shortcut Method (Assumed mean method)
Where,
Step deviation method:
When the class-interval is very large then step deviation method is used to find mean.
Where,
2. Median() or Second quartile ()
For continuous or grouped data
- Where, lower limit of median class c.f. of the preceding class frequency of median class class -height or, class - size or class interval Note: The median divides the data into two equal parts. It is also called second quartile. The median divides the continuous data below 50% or above 50%.
- Where, lower limit of class c.f. of the preceding class frequency of class class -height or, class - size or class interval Note: First quartile divides the continuous data below 25% or above 75%.
- Where, lower limit of class c.f. of the preceding class frequency of class class -height or, class - size or class interval Note: Third quartile divides the continuous data below 75% or above 25%.
User Guideline
Dear learner,
- Click Green coloured buttons for table.
- Click Cyan coloured buttons for solution steps.
- To change data, click on check box named Ambik .
- Again click check box .
- Again click Green coloured buttons for table.
- Again click Cyan coloured buttons for solution steps.
- We can use this applet to check our answer steps and to teach our students.