A cellular phone company monitors monthly phone usage. The 324 401 370 494 334 following data represent the monthly phone use in minutes of one particular customer for the past 20 months. Use the given data to answer parts (a) and (b). 338 471 321 498 442 364 557 388 448 516 552 337 330 526 508 (a) Determine the standard deviation and interquartile range of the data. (Round to two decimal places as needed.) Enter your answer in the answer box and then click Check Answer. O parts Clear All Check Answer

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