Sampling distribution for a population's proportion According to a national research center, 72% of Americans are satisfied with the way things are going in their lives. Therefore, the population proportion p = .720 (a) Suppose random sample size is n = 300. Then the p sampling distribution can be described by Shape: Normal/bell-shaped Center: mean = .720 Spread: std.dev. = ? (b) Draw the normal curve for this p sampling distribution. Make sure to label the tick marks for center and inflection points. (c) In a random sample of three hundred Americans, find the Probability that the proportion of satisfied Americans is greater than . 730 Make sure to shade and label the probability region under your normal curve, and show normalcdf with the exact std.dev. Round your final answer to four decimal places