An EWMA chart is used to monitor a temperature in a pharmaceutical process. An automated measurement is obtained selected every minute and added to the EWMA chart. Experience indicates that s = 0.5 °F. The process target (process mean when in control) is 72 °F. The EWMA uses a lamda value 2=0.35. If the accumulated value of the EWMA at the end of measurement 47 is Z47 = 72.165 and measurement 48 is equal to X48 = 72.466, what will be the accumulated value of the EWMA at the end of measurement 48, that is Z48 = ? O 72.225 O 72.240 72.285 72.270 not enough information O 72.255

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An EWMA chart is used to monitor a temperature in a pharmaceutical process. An automated
measurement is obtained selected every minute and added to the EWMA chart. Experience indicates that s
= 0.5 °F. The process target (process mean when in control) is 72 °F. The EWMA uses a lamda value
2=0.35. If the accumulated value of the EWMA at the end of measurement 47 is Z47 = 72.165 and
measurement 48 is equal to X4g = 72.466, what will be the accumulated value of the EWMA at the end of
measurement 48, that is Z48 = ?
72.225
72.240
72.285
72.270
not enough information
72.255
Transcribed Image Text:An EWMA chart is used to monitor a temperature in a pharmaceutical process. An automated measurement is obtained selected every minute and added to the EWMA chart. Experience indicates that s = 0.5 °F. The process target (process mean when in control) is 72 °F. The EWMA uses a lamda value 2=0.35. If the accumulated value of the EWMA at the end of measurement 47 is Z47 = 72.165 and measurement 48 is equal to X4g = 72.466, what will be the accumulated value of the EWMA at the end of measurement 48, that is Z48 = ? 72.225 72.240 72.285 72.270 not enough information 72.255
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