# Question

Use the fraud-detection data from Problem 25 to do the following.

(a) Determine the standard deviation and interquartile range of the data.

(b) Suppose the month in which the customer used 346 minutes was not actually that customer’s phone. That particular month, the customer did not use her phone at all, so 0 minutes were used. How does changing the observation from 346 to 0 affect the standard deviation and interquartile range? What property does this illustrate?

(a) Determine the standard deviation and interquartile range of the data.

(b) Suppose the month in which the customer used 346 minutes was not actually that customer’s phone. That particular month, the customer did not use her phone at all, so 0 minutes were used. How does changing the observation from 346 to 0 affect the standard deviation and interquartile range? What property does this illustrate?

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