The cycle time of an accounts receivable process is a 30,000-foot-level metric. Twelve random samples from invoices were selected over the year—one random sample selected for each month. One of two...

The cycle time of an accounts receivable process is a 30,000-foot-level metric. Twelve random samples from invoices were selected over the year—one random sample selected for each month. One of two invoicing departments was noted for each invoice. The monetary value for each invoice was also noted. Determine the confidence interval for the mean cycle time and conduct other appropriate analyses.