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In order to measure the heat resistance of a kind of plastic ware a sample of...

In order to measure the heat resistance of a kind of plastic ware a sample of 11 units will be selected from the products and their degree of softening will be measured.If the avarage is 230 degree and the standart deviation is 50 degree can you say that the heat resistance of the wares is not below 250 degree with an error of 0,05

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orchestra answered 2 years ago
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