Question

The mean of the following frequency distribution is 25. Find the value of f.

Find the mean of the following data using assumed mean method :

The weights (in kg) of 50 wild animals of a National Park were recorded and the following data was obtained : | Weight (in kg) | Number of animals | |----------------|------------------| | 100 – 110 | 4 | | 110 – 120 | 12 | | 120 – 130 | 23 | | 130 – 140 | 8 | | 140 – 150 | 3 | Find the mean weight (in kg) of animals, using assumed mean method.

In the formula x̄ = a + Σfᵢdᵢ/Σfᵢ, for finding the mean of grouped data dᵢ's are deviations from a of