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LetX= the time (in minutes) that a postal clerk spends with her customers. This time is known to ...

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LetX= the time (in minutes) that a postal clerk spends with her customers. This time is known to ...

LetX = the time (in minutes) that a postal clerk spends with her customers. This time is known to have an exponential distribution with an average of 4 minutes. What is the variance for this distribution?

▸

0.25

▸

0.0625

▸

0.025

Textbook

Introductory Statistics: A Problem-Solving Approach

Edition: 3^rd

Author: Kokoska

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Thanks for your help!!

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