he letter e is the most common in the English language. What percentage of English words contain the letter e? In a sample of 250 randomly chosen words from the dictionary, 173 contained the lettere. 1. Give a 95% confidence interval for the proportion of English words con- taining the letter e. 2. In the entire dictionary, about 69.5% of words actually contain an e. Does your confidence interval agree with this and why?