A nonprofit wants to understand the fraction of households that have elevated levels of lead in their drinking water. They expect at least 5% of homes will have elevated levels of lead, but not more than about 30%. They randomly sample 880 homes and work with the owners to retrieve water samples, and they compute the fraction of these homes with elevated lead levels. They repeat this 1,000 times and build a distribution of sample proportions. (a) What is this distribution called? sampling distribution O geometric distribution O normal distribution O Poisson distribution O binomial distribution b) Would you expect the shape of this distribution to be symmetric, right skewed, or left skewed? Explain your reasoning. We know the smallest possible value of np is 44 and the smallest possible value of n(1 - p) is , so the success-failure condition is satisfied and we