What is the way to solve the problem of question of exercise 14.1 of statistics of class 10th ncert of statistics chapter of question no,7 how i solve this question in easy way please help me to solve this question To find out the concentration of SO2 in the air (in parts per million, i.e., ppm), the data was collected for 30 localities in a certain city and is presented below:Find the mean concentration of SO2 in the air.
To find out the mean, first find the midpoint of the given frequencies as follows:
The formula to find out the mean is
Mean = x̄ = ∑fixi /∑fi
= 2.96/30
= 0.099 ppm
Therefore, the mean concentration of SO2 in air is 0.099 ppm.