Nationally, the average score on the GRE (Graduate Record Examinations) verbal test is 453 with a standard deviation of 95. A random sample of 152 first-year graduate students entering Algebra University shows a mean score of 502. Is there a significant difference?
A random sample of 423 Albertans has finished an average of 12.7 years of formal education with a standard deviation of 1.7. Is this significantly different from the national average of 12.2 years?
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