A cellular phone company monitors monthly phone usage. The following data represent the monthly phone use in minutes of one particular customer for the past 20 months. Use the given data to 329 542 461 550 554 0 551 365 435 505 479 answer parts (a) and (b). 443 448 486 394 356 449 346 487 544 371 (a) Determine the standard deviation and interquartile range of the data. s=(Round to two decimal places as needed.) IQR = (Type an integer or a decimal.) (b) Suppose the month in which the customer used 329 minutes was not actually that customer's phone. That particular month the customer did not use their phone at all, so 0 minutes were used. How does changing the observation from 329 to 0 affect the standard deviation and interquartile range? What property does this illustrate? The standard deviation and the interquartile range What property does this illustrate? Choose the correct answer below. O Weighted Mean O Empirical Rule O Resistance O Dispersion