Construct a combined histogram and frequency polygon for the following data:
| Weekly earnings (in rupees) | 150-165 | 165-180 | 180-195 | 195-210 | 210-225 | 225-240 |
| No. of workers | 8 | 14 | 22 | 12 | 15 | 6 |
Solution:
In a study of diabetic patients, the following data was obtained:
| Age (in years) | 10-20 | 20-30 | 30-40 | 40-50 | 50-60 | 60-70 | 70-80 |
| No. of patients | 3 | 8 | 30 | 36 | 27 | 15 | 6 |
Represent the above data by a histogram and a frequency polygon.
Solution:
More Solutions:
- The class marks of a frequency distribution are given:
- A grouped frequency distribution table with class intervals:
- If the mean of x1, x, is 7.5, and the mean of x1, X2, x3 is;
- The mean of 100 observations is 50.
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- Find the mean and the median of all the (positive) factors of 48.
- Find the mean weight of the remaining students.
- What is the new mean age?