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23 October, 00:09

For a group experiment, your science class measured the fine-particulate concentration in the air at random places around campus, and estimated a sample average of 32 micrograms per cubic meter, if 225 readings were take, and the standard deviation of the sample measurement was 3 you are 99.7% confidence that actual concentration of fine particulates at the school is?

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  1. 23 October, 02:22
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    Its 31.4 - 32.6 this for apex
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