Describe the commonly used measures of central tendency. Explain any one qualitative technique used for research.

Measures of central tendency are statistical measures that describe where the center of a distribution of data points lies. They provide a single value that represents the "middle" or "typical" value of a dataset. The three commonly used measures of central tendency are:

1. Mean:
   - The mean, also known as the average, is the sum of all values in a dataset divided by the number of values.
   - Formula: \(\bar{x} = \frac{\sum_{i=1}^{n} x_i}{n}\), where \(\bar{x}\) is the mean, \(x_i\) are individual data points, and \(n\) is the number of data points.
   - Example: If you have test scores of 80, 85, 90, and 95, the mean score is \(\frac{80 + 85 + 90 + 95}{4} = 87.5\).

2. Median:
   - The median is the middle value in a dataset when the values are arranged in ascending or descending order.
   - If there is an odd number of observations, the median is the middle value. If there is an even number, it is the average of the two middle values.
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