Confidence interval of the mean score
The average score for 49 teenage boys playing a certain computer game was 75,000 points per player. If the standard deviation of the population is 20,000 points, find the 99% confidence interval of the mean score for all teenage boys.
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Raul received a score of 80 on a history test for which the class mean was 70 with standard deviation 10. He received a score of 75 on a biology test for which the class mean was 70with standard deviation 2.5. On which test did he do better relati
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