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           _    _     _  __    ______   _    _   
    ___   | || | ||  | |/ //  /_   _// | || | || 
   /   || | || | ||  | ' //    -| ||-  | || | || 
  | [] || | \\_/ ||  | . \\    _| ||_  | \\_/ || 
   \__ ||  \____//   |_|\_\\  /_____//  \____//  
    -|_||   `---`    `-` --`  `-----`    `---`   
     `-`

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Text this: CUSUM chart with transformed exponential data