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. An educational researcher sought to estimate the average number of close friends that students on...

. An educational researcher sought to estimate the average number of close friends that students on a particular campus made during their first year of school. Questioning a random sample of 50 students completing their freshman year, he finds a sample mean of 3 close friends. Assume the population standard deviation is 1. Construct a 95 percent confidence interval to estimate the mean number of close friends made by the population of college students during their first year on campus.

a. Identify the margin of error

math   Statistics-And-Probability   
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