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River Bottom Fire Department ( Prob . 8 - 2 2 ) deter - mined that they needed to adjust their data - gathering process
River Bottom Fire Department Prob determined that they needed to adjust their data gathering process for response time to eliminate bias. The times were expected to fall within and minutes. After doing so they wanted to evalu ate the process to determine whether or not it was under control. Thirty new samples were taken on random days from stations. These data can be found in the worksheet Prob. in the CData.xlsx file on the Student Companion Site for this chapter.a Compute the mean and range of each sample, calculate control limits and plot them on x and R control charts.b Does the process appear to be in statistical con trol? Calculate descriptive statistics that may help you to determine the answer to this question. What evidence is there for your conclusion?
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