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Let us take a look at some basic statistical tools used in Python:

                 Mean

                 It is the average of numeric data in a given dataset. So, sum of all the values divided by the number of values in
                 the given set.
                 It is calculated as:

                 Mean =
                 To calculate mean in Python:

                    [1]:  import statistics
                          marks=[45,34,41,46,47,39,38,48,45,34,41,39,39]
                          m=statistics.mean(marks)
                          print("the average marks of the class :",round(m,2))

                          the average marks of the class : 41.23

                 Median

                 When the data is arranged in an ascending/descending order then median is the middle number in a given
                 dataset. If there are two middle numbers, the mean of these two numbers will give the median.

                 For odd number of dataset:    N + 1  th  term
                                                2
                                               N  th       N     th
                 For even number of dataset:    2  term +  2  + 1  term
                                                          2
                 To calculate median in Python with odd number of values:

                    [1]:  import statistics
                          marks=[45,34,41,46,47,39,38,48,45,34,41,39,39]
                          m=statistics.median(marks)
                          print("the middle value of the sorted marks in class :",m)

                          the middle value of the sorted marks in class : 41

                 To calculate median in Python with even number of values:

                    [1]:  import statistics
                          marks=[40, 45,34,41,46,47,39,38,48,45,34,41,39,39]
                          m=statistics.median(marks)
                          print("the middle value of the sorted marks in class :",m)

                          the middle value of the sorted marks in class : 40.5

                 Mode

                 It is the most frequent value in a given dataset.

                 There is no formula for this:
                 Mode = The value in the data set that occurs most frequently







                                                                                    Advance Python (Practical)  295
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