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?
122 Touchpad Data Science-X

