Question

formula for mean and explain every term in it

Answer 1

I hope you will satisfy this

Answer 2

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What are the formulas for mean,median and mode in statistics?


◆The formula of mean is, Mean <x> = ∑x/N 
where 
∑ represents the summation
x represents scores
N represents number of scores.

◆The formula of median is,
Median = (n+1)/2 th term    ; when n is a odd number
Median: [(n/2) th term + {(n/2)+1} th term ] / 2  ; when n is an even number

◆And, Mode is the most frequently occurring value.

◆Let us have an example.

◆Given sequence :18, 21, 7, 4, 18, 14, 9
Total number of numbers in the sequence(N) = 7

◆So, Mean = (18+21+7+4+18+14+9)/7 = 13

◆Now, To calculate the median, first we need to arrange the sequence in the ascending order
Ascending order of the sequence = 4, 7, 9, 14, 18, 18, 21
◆Total number of numbers in the sequence = 7 = odd
◆So, Median = (n+1)/2 th term = (7+1)/2 th term = 4th term i.e 14

◆And here 18 is repeated two times so Mode of the sequence is 18.