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what is the difference between sum and cumulative sum? how do you perform the two on dataframe?

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what is the difference between sum and cumulative sum? how do you perform the two on dataframe? Select the correct answer from above options

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Answer: The cumulative sum is not the cumulative sum of the values. Instead it is the cumulative sum of differences between the values and the average. … The amounts added to the cumulative sum will be positive and the sum will steadily increase.

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