Answer / Amit Nagar

1. Mean: The arithmetic average of a dataset, calculated by adding all values in the dataset and then dividing by the count of data points. (mean = sum of data / count of data).
2. Median: The middle value in a sorted dataset when there is an odd number of observations. If there's an even number of observations, the median is the average of the two middle values.
3. Mode: The most frequently occurring value(s) in a dataset.
4. Standard Deviation: A measure of the spread or dispersion of data points from the mean. It provides information about how closely the data points are grouped around their average.

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