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.
543 432 389 499 498 493
335 488 418 420 529 480
483 513 481 545 526 547
A) Determine the standard deviation and interquartile range of the data.
B) Suppose the month in which the customer used 327 minutes was not actually that customers phone That particular month the customer did not use their phone at all so 0 minutes were used. How does changing the observation from 327 to 0 affect the standard deviation and interquartile range?
The standard deviationand the interquartile range.
What property does this illustrate?
A. Empirical Rule.
B. Resistance.
C. Weighted Mean.
D. Dispersion.