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The Mean Number of Text Messages Sent Per Month by Customers

question 23

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The mean number of text messages sent per month by customers of a cell phone service provider is 1,850, and the standard deviation is 800. Find the z-score associated with 3,000 messages sent. ​


Definitions:

Endangered Species

Species at risk of extinction due to a significant decline in population or habitat, requiring protection and conservation efforts.

Low Birth Rate

A demographic situation where the number of live births per 1,000 people in a population is lower than usual, often signaling changes in society or economy.

Carrying Capacity

The highest population level of a species that can be maintained over time in an environment, considering the resources present.

Sylvatic Plague

A naturally occurring disease found in wild rodent populations, caused by the bacterium Yersinia pestis, and can spread to humans and other animals.

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