GED Math Practice Test

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How is the mean or average of a set of data points calculated?

By adding all data points and dividing by the number of data points
By finding the middle number in a sorted list
By finding the range between the highest and lowest numbers
By selecting the most frequently occurring number

The correct answer is: By adding all data points and dividing by the number of data points

The mean or average of a set of data points is calculated by summing all the data points together and then dividing that total by the number of data points. This method provides a central value that represents the data set, taking into account all values. The other methods mentioned have different purposes: finding the middle number in a sorted list refers to the median, calculating the range involves subtracting the lowest value from the highest value, and determining the most frequently occurring number is known as the mode. Each of these concepts serves a unique role in statistical analysis, but for calculating the mean, addition and division are essential.