Brian Vanecek, VP of Operations at Portland Trust Bank, is evaluating the service level provided to walk-in customers. Accordingly, his staff recorded the waiting times for 45 randomly selected walk-in customers, and calculated that their mean waiting time was 15 minutes.

If Brian concludes that the average waiting time for all walk-in customers is 15 minutes, he is using a/an ________. range estimate statistical parameter interval estimate point estimate exact estimate.

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