353 The following data represent the monthly phone use, in minutes, of a customer enrolled in a fraud prevention program for the past 20 months. The phone company decides to use the upper fence as the cutoff point for the number of minutes at which the customer should be contacted. What is the cutoff point? 361 543 355 460 408 494 517 324 542 424 353 307 388 318 369 532 516 308 483 The cutoff point is minutes. (Round to the nearest minute.)

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