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According to the National Vital Statistics Report, the proportion of deaths due to heart diseases in 2016 is 23.1%. Suppose a researcher claims that there

According to the National Vital Statistics Report, the proportion of deaths due to heart diseases in 2016 is 23.1%. Suppose a researcher claims that there has been a decline in this value for the following year. He randomly sampled 100 deaths in 2017 and found that 20 of them were due to heart diseases. What are the appropriate hypotheses

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