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6% of all merchandise sold gets returned in an imaginary country, Camaro. Sampled 80 items are sold in October, and it is found that 12

6% of all merchandise sold gets returned in an imaginary country, Camaro. Sampled 80 items are sold in October, and it is found that 12 of the items were returned at the store in Magi Province.

a) Construct a 95% confidence interval for the proportion of returns at the store in Magi Province

b) Is the proportion of returns at the Magi store significantly different from the returns for the nation, (Camaro) as a whole? Provide statistical support for your answer using hypothesis testing.

DO NOT USE EXCEL & PLEASE SHOW ALL STEPS AND CALCULATIONS.

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