CBSE Class 7 Maths Notes for Chapter 3 Data Handling

                                   CHAPTER 3 DATA HANDLING
 
 
 
AVERAGE
Average is also known as arithmetic mean. Mean is the number that represents the central tendency of the data.
 
                              Mean = (Sum of all observations)/(Total number of observations)
 
RANGE
 The difference between the highest and the lowest observation is called the range.
 
 
MODE
The mode is the set of observation that occurs the most.
 
 
MEDIAN
It is the value that lies in the middle of the data.
 

CHANCE AND PROBABILITY
Chance is the possibility of an event happening.
Probability is the measure of chance. For example, the probability of getting 3 in a die throw is 1/6. As there is a possibility of 6 numbers thrown and 3 is one of those numbers.