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27-02-2024
Mathematics

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If we imagine all the possible random samples of 250 students at this university, 68% of the samples should have means between what two numbers?
a) ±1 standard deviation from the population mean
b) ±1.5 standard deviations from the population mean
c) ±2 standard deviations from the population mean
d) ±3 standard deviations from the population mean

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