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QUESTION
An educational researcher wants to estimate the mean amount of money spent on books (per semester) for her university.
An educational researcher wants to estimate the mean amount of money spent on books (per semester) for her university. The researcher chooses a random sample of 200 students and finds the sample mean to be $350. At a 95% confidence level the margin of error is 70.
Based on this, it would be reasonable to claim that with 95% confidence, the average amount of money spent on books is at which value?
