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Table 1-Statistical Process Control (SPC) Problem Data for Service Waiting

Question 19

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Table 1-Statistical Process Control (SPC) Problem Data for Service Waiting Times
 Sample  Number \multicolumn3c Observation Number 12319.610.29.829.410.010.439.99.69.049.310.59.959.79.29.7\begin{array} { | c | c | c | c | } \hline \begin{array} { c } \text { Sample } \\\text { Number }\end{array} & \multicolumn{3}{|c|} { \text { Observation Number } } \\\hline & 1 & 2 & 3 \\\hline 1 & 9.6 & 10.2 & 9.8 \\\hline 2 & 9.4 & 10.0 & 10.4 \\\hline 3 & 9.9 & 9.6 & 9.0 \\\hline 4 & 9.3 & 10.5 & 9.9 \\\hline 5 & 9.7 & 9.2 & 9.7 \\\hline\end{array}
-In Table 1, the sample values represent service waiting times in minutes. For the R-chart, what is the value of UCLR?


A) Less than or equal to 1.5
B) Greater than 1.5 but less than or equal to 2.0
C) Greater than 2.0 but less than or equal to 2.5
D) Greater than 2.5

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