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|  __ \\   |  ___|| \ \\ / //   / _ \\    / ___// 
| |  \ ||  | ||__    \ \/ //   / //\ \\   \___ \\ 
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|_____//   |_____||    \//    |_||  |_|| /____//  
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Text this: Estimating change point and process mean in control charts