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4. Among those taking the Graduate Record Exam, 18 people are randomly selected This group had a mean score of 550 and a standard deviation

4. Among those taking the Graduate Record Exam, 18 people are randomly selected This group had a mean score of 550 and a standard deviation of 140. What is the 95% condence interval for the population mean for the GRE test. Identify the point estimate for the mean and the margin of error

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