What is the average height of 300 students in an instructor's class? To determine this, the instructor measures the heights of 30 students selected at random, obtaining a 95% confidence interval for the average height from 64.6 to 67.1 inches. a) In complete sentences, give an interpretation of what this 95% confidence interval for the 300 students' averge height means. There is 95% chance that the height of a student lies within this interval. We are 95% confident that the average height of all 300 students lies within this interval. We are 95% confdident that the average height of the sample of 30 students lies within this interval We are 95% confident that the weight of a student lies within this interval. Correct: Your answer is correct. b) The sample mean is 66.94 Incorrect: Your answer is incorrect. inches. (Round to two decimal places)

Design an er diagram for keeping track of information about votes taken in the u.s. house of representatives during the current two-year congressional session. the database needs to keep track of each u.s. state's name (e.g., texas', new york', california') and include the region of the state (whose domain is {northeast', midwest', southeast', southwest', west'}). each congress person in the house of representatives is described by his or her name, plus the district represented, the start date when the congressperson was first elected, and the political party to which he or she belongs (whose domain is {republican', democrat', 'independent', other'}). the database keeps track of each bill (i.e., proposed law), including the bill name, the date of vote on the bill, whether the bill passed or failed (whose domain is {yes', no'}), and the sponsor (the congressperson(s) who sponsored - that is, proposed - the bill). the database also keeps track of how each congressperson voted on each bill (domain of vote attribute is {yes', no', abstain', absent'}). additional information: