Suppose a national survey conducted among a simple random sample of 1,528 American adults, 815 indicate that they think the Civil War is still relevant to American politics and political life.

Susan is interested in using this survey data to conduct a statistical inference tp determine if the majority (more than 50%) of Americans think the Civil War is still relevant.

A normal distribution is used to carry out the appropriate hypothesis test.

What is thenull standard errorused to calculate the test statistic for this hypothesis test? Give your answer to 4 decimal places.