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Mathematics, 30.06.2019 11:30 payshencec21
The average monthly cell phone bill was reported to be $50.07 by the u. s. wireless industry. random sampling of a large cell phone company found the following monthly cell phone charges (in dollars): 52.62 46.27 59.77 67.2157.26 49.24 45.99 46.8155.39 48.08at the 0.05 level of significance, can it be concluded that the average phone bill has increased?
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