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30 January, 14:13

A research study shows that the yearly cost of dental claims for virginia state employees with dental care as a part of their health insurance has a distribution with a mean of $1200 and a standard deviation of $200. if a random sample of 25 virginia state employees with dental insurance is selected, what is the probability that the mean of the yearly dental claims for this sample is between $1175 and $1225?

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  1. 30 January, 17:05
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    The right answer is 50%.
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