Mathematics, 28.06.2019 15:50 markthecow

Astatistics student would like to estimate the average age of students at her college. she would like to be 95% confident that her estimate includes the actual college population mean. she did a smaller preliminary survey and found that a reasonable estimate of the population standard deviation was 2 1/2 years. how many people must she survey if she wants to be within 1/2 year of the true population mean? round off your answer to the nearest integrer.

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