1? You want to have 95% confidence of estimating the proportion of people who choose to sit at a table drinking their coffee {rather than taking it to go] within 1 0.05. In the end, you observe that 151 customers drank their coffee at the store. Using a 90% condence interval estimate for the proportion of customers who drank their coffee at the store, determine the confidence interval given the above data. Use the tables in the book for 2,\". HOT Excel. a} What is Z\"; for the 95% confidence interval? b} What is the sampling error? c] What is population portion, it? d} What is the number of customers you must observe? e] What is the portion of those customers that drank their coffee at the store based on question (3')? 0 What is the lower-level percentage of customers who drank their coffee at the store? 3} What is the upper-level percentage of customers who drank their coffee at the store