Binned data

• median class is a class to which a point, dividing the set into two equal halves belongs.
• How to find median class?

  Compute relative frequency and cumulative frequency. Then choose the class, which has a cumulative frequency >= 0.5.
• How to find median value withing median class?

  $median\; value =$$L +$$\frac{0.5-F_p}{F_c-F_p}(U-L)$
• What symbols in formula of computing median formula means?


  L - Lowest value within the bin

  U - Biggest value within the bin

  F_c - cumulative frequency of the current class

  F_p - cumulative frequency of the previous class