Statistics

Mean is calculated by adding all

Mean is calculated by adding all values and dividing by the number of values. However, extreme values (very high or very low) can significantly affect

Median is the middle value when

Median is the middle value when data is arranged in ascending order. For odd number of values, it's the middle value. For even number of values, it's

When data is presented in frequency

When data is presented in frequency tables, median is found by: 1) Creating cumulative frequency table, 2) Finding the position of median (n+1)/2 for

For grouped data

For grouped data: 1) Create cumulative frequency table, 2) Find median class containing the n/2th observation, 3) Assume uniform distribution within t

In histograms

In histograms, a vertical line through the median divides the graph into two parts of equal area. This means the probability of selecting a value belo