Sir give me the best solution of the Statistics chapter of class 10th ncert of exercise 14.1 of question no.2, please give me the best way to solve this problem Consider the following distribution of daily wages of 50 workers of a factory.Find the mean daily wages of the workers of the factory by using an appropriate method.
Find the midpoint of the given interval using the formula.
Midpoint (xi) = (upper limit + lower limit)/2
In this case, the value of mid-point (xi) is very large, so let us assume the mean value, A = 150 and class interval is h = 20.
So, ui = (xi – A)/h = ui = (xi – 150)/20
Substitute and find the values as follows:
So, the formula to find out the mean is:
Mean = x̄ = A + h∑fiui /∑fi =150 + (20 × -12/50) = 150 – 4.8 = 145.20
Thus, mean daily wage of the workers = Rs. 145.20