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probable error
prob·a·ble er·ror (plural prob·a·ble er·rors)


noun 
Definition:
 
allowance for chance: the amount by which a statistic may vary from fact, based on chance factors
Encarta® World English Dictionary [North American Edition] © & (P)2009 Microsoft Corporation. All rights reserved. Developed for Microsoft by Bloomsbury Publishing Plc.
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