Based on historical data, your manager believes that 32% of the company's orders come from first time customers. A random sample of 128 orders will be used to estimate the proportion of first time-customers. What is the probability that the sample proportion is less than 0.31? Note: You should carefully round any z-values you calculate to 4 decimal places to match wamap's approach and calculations. Answer ( Enter your answer as a number accurate to 4 decimal places .)
