Page 124 - Data Science class 10
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Example 1.5: Let us understand how to find a mean with the help of the below example. Consider that we have a
        set of 11 numbers 20 to 30 in a dataset.
        Array = {20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30}
        In this series, mean is calculated by adding up 11 numbers in the dataset.

        Sum of all the numbers = 275
                275
        Mean =       = 25
                 11
        Let us now try to understand the real-life application of mean.

        Following is the recorded average temperature month-wise in New Delhi. You have to calculate yearly mean of the
        temperature in this particular year.


             Jan      Feb   March    April    May      June    July     Aug     Sept     Oct      Nov     Dec
            12.5     15.9    23.5     28.2    32.8      34      27.9    28.6     26.8    25.5     21.5    15.6


        Mean  =   (12.5 + 15.9 + 23.5 + 28.2 + 32.8 + 34 + 27.9 + 28.6 + 26.8 + 25.5 + 21.5 + 15.6)
                                                      12
                  292.8
               =
                   12
               = 24.4
                                                            24.4°C





























                                                            Mean



          Activity         2


              • Height of Romesh: 158cm
              • Height of Jyoti: 138cm
              • Height of Sushma: 152cm
              • Height of Aryan: 157cm
           What is the mean?




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