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

question 19

Multiple Choice

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

• 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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