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Mathematics 19 Online
OpenStudy (anonymous):

someone please help ??

OpenStudy (anonymous):

Directrix (directrix):

Please post your question. Thanks.

OpenStudy (anonymous):

A proposed null hypothesis states that there is no difference in the water consumption of households in two districts. The sample mean difference is 8.5 liters, and the standard deviation of the distribution of the difference in sample means is 4.5 liters. The null hypothesis must be accepted if we choose the ( 68% 95% 99.7% ) confidence interval

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