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Question: 17 the mean number of text messages sent per month...

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17. 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 a, z=2.75 b. z 1.44 -144 1.19 z40.66 2门5 irs0-3000
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