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A cell phone company wants to know how many text messages are sent per month, on average, by their customers. They know from previous research

A cell phone company wants to know how many text messages are sent per month, on average, by their customers. They know from previous research that the population standard deviation is 150, and draw a sample of 100 which has a mean of 800 text messages per month. What is the point estimate of the mean from this evidence? 

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