(10th class ) plz give the formulas of mean , median , mode ...fast can send a image also urgent
Answers
Mean:
-- Also known as the average. The mean is found by adding up all of the given data and
dividing by the number of data entries.
Example:
- the grade 10 math class recently had a mathematics test and the grades were as
follows:
78
66
82 464 / 6 = 77.3
89
75 Hence, 77.3 is the mean average of the class.
+ 74
464
Median:
-- The median is the middle number. First you arrange the numbers in order from lowest
to highest, then you find the middle number by crossing off the numbers until you reach the
middle.
Example:
- use the above data to find the median:
66 74 75 78 82 89\
- as you can see we have two numbers, there is no middle number. What do we do?
It is simple; we take the two middle numbers and find the average, ( or mean ).
75 + 78 = 153
153 / 2 = 76.5
Hence, the middle number is 76.5.
Mode:
-- this is the number that occurs most often.
Example:
- find the mode of the following data:
78 56 68 92 84 76 74 56 68 66 78 72 66
65 53 61 62 78 84 61 90 87 77 62 88 81
The mode is 78.