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Below are prices (in $) of certian phone at different stores 460 670 780 500 450 500 560 670 460 660 560 490 650 788

Below are prices (in $) of certian phone at different stores

460 670 780 500 450 500 560 670 460 660

560 490 650 788 876 560 579 679 800 560

At a=0.05, can we claim that the mean price of this phone is above $550? Use:

a) a hypothesis test b) an appropriate Cl

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