In order to ascertain the variance of a frequency table, one must initially compute the mean. Following this, each individual data point should have the mean subtracted from it. The results of this should then be squared, and these squared results should be multiplied by their corresponding frequencies. Once these values have been summed, the total frequency should be used to divide this sum, leading to the calculation of the variance. This provides a measure of the dispersion of the data points.
| Topic | Problem | Solution |
|---|---|---|
| None | A survey was conducted to find out the number of … | First, we calculate the mean (\(\mu\)) of the frequency distribution, which is the sum of the produ… |