mean,median,mode

•  this symbol x̅ is mean
• summation of the numbers / the total numbers is the formulation for the mean
• x hat is the symbol of the mode
• x-tilde is the symbol of median
• mean - average of a set of values, calculated by dividing the total by the number of values in the set
• mode - the most common value in a data set, the value that occurs most often
• median - middle value when all the values are arranged from smallest to largest or vice versa
• for grouped data:

  this is the formula for mean

  summation of FX / summation of frequency
• for grouped data:

  this is the formula for median

  lbmc+ [ (summation of frequency / 2) - less than communative frequency ]/ fmc * i
• for grouped data:

  this is the formula for mode

  lbmo+[d1/d1+d2] i