A random sample of n=400 is taken from a population and x = 251 have a specified characteristic. Calculate the upper bound for a two-sided 90% confidence interval for the true proportion of...

Extracted text: A random sample of n=400 is taken from a population and x = 251 have a specified characteristic. Calculate the upper bound for a two-sided 90% confidence interval for the true proportion of individuals in the population with the specified characteristic. Hint: The formula for a two-sided confidence interval is P(1 – ô) - p + Zal2 n Enter your answer to 3 decimal places.