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GRE
GRE Quantitative Reasoning Section

Standard Deviation Calculation

Hard Data Analysis Descriptive Statistics

Consider the following dataset representing the number of books read by a group of 15 individuals during a year:

3, 7, 2, 5, 10, 8, 7, 0, 1, 5, 6, 4, 3, 2, 5

Calculate the standard deviation of the number of books read.

To compute the standard deviation:

1. Calculate the mean of the dataset.

2. Subtract the mean from each data point and square the result.

3. Find the average of those squared differences.

4. Take the square root of that average.

Hint

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% Correct58%