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The following table shows the age of patients admitted in a hospital during a particular week : | Age (in years) | 5 – 15 | 15 – 25 | 25 – 35 | 35 – 45 | 45 – 55 | 55 – 65 | |----------------|--------|---------|---------|---------|---------|----------| | Number of Patients | 5 | 12 | 20 | 24 | 15 | 4 | Find the mean age of the patients.
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 is the:
Find the value of Σfᵢdᵢ if the mean is 25, the assumed mean is 20 and Σfᵢ = 40.
Find the mean of the following data using the assumed mean method: | Class | 10–25 | 25–40 | 40–55 | 55–70 | 70–85 | 85–100 | | Frequency | 2 | 3 | 7 | 6 | 6 | 6 |
The following distribution shows the weekly pocket allowance (in ₹) of some children of a locality. The mean pocket allowance is ₹ 180. | Weekly Pocket Allowance (in ₹) | Number of Children | |-------------------------------|--------------------| | 110 – 130 | 7 | | 130 – 150 | 6 | | 150 – 170 | 9 | | 170 – 190 | 13 | | 190 – 210 | f | | 210 – 230 | 5 | | 230 – 250 | 4 | Find the value of f. Hence find the mode of given data.
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