Question

All formulae for statistics class 9​

Answer 1

Statistics

Measure of Central Tendency

Mean  Sum of Observation/Total number of observation = ∑ x/n

Median [(n+1)/2]th term [For odd number of observation]

Mean of (n/2)th term and (n/2+1)th term [For even number of observation]

Mode Value which is repeated maximum time in a data set