Find the z-score for testing the hypothesis

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A matched pairs design is often used to compare two products such as colas. Each subject tastes both colas in random order without knowing which cola he/she is tasting. The subject then selects his/her preferred cola. Suppose that 45 of 75 people preferred cola brand A. The 95% confidence interval for the proportion of the population who favor brand A. Next, find the z-score for testing the hypothesis of no brand preference

Reference no: EM132152115

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