In estimating the total value of supplies on repair trucks, Baker Company draws random samples from two equal-sized strata of trucks. The mean value of the inventory stored on the larger trucks (stratum 1) was computed at $1,500, with a standard deviation of $250. On the smaller trucks (stratum 2), the mean value of inventory was computed as $500, with a standard deviation of $45. If Baker had drawn an unstratified sample from the entire population of trucks, the expected mean value of inventory per truck would be $1,000, and the expected standard deviation would be .
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In estimating the total value of supplies on repair trucks, Baker Company draws random samples from...
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