A bell curves can be skewed negatively or positively

Bell curved distribution can be skewed, this is where the curve may happen more suddenly, The mode still marks the very top of the curve always, GCSE

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Right Skewed vs. Left Skewed Distribution

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What would cause a bell curve to be skewed (not symmetric)? - Quora

Statistical Distributions

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Trent Psychology Modules

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Can normal distribution be skewed? - Quora