recent study surveyed adults on their views about the Covid-19 vaccine.  In a random sample of 850 adults, 430 said that they are concerned that Covid-19 variants will hamper the country's ability to stop the spread of the disease.  Use this sample to construct a 90% confidence interval for the population proportion of all U.S. adults who are concerned that Covid-19 variants will hamper the country's ability to stop the spread of the disease.

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