A college alumni organization sent a survey to all recent graduates to ask their annual income. Twenty percent of the alumni responded, and their mean annual income was . Assume the population standard deviation is . Explain why these data should not be used to construct a confidence interval for the mean annual income of all recent graduates

The first one is correct

This is what i found “an explicit formula designates the nth term of the sequence, as an expression of n (where n = the term's location). it defines the sequence as a formula in terms of n. this example is an arithmetic sequence(the same number, 5, is added to each term to get to the next term).” i hope this you for what your looking for. can you plz mark me brainliest?

B) greg: 30 points , tremaine 38 points