The population standard deviation for the scores of a standardized test is 5 points. If we want to be 95% confident that the sample mean is within 2 points of the true population mean, what is the minimum sample size that should be taken?z = 0.10 –> 1.282z = 0.05 –> 1.645z = 0.025 –> 1.960z = 0.01 –> 2.326z = 0.005 –> 2.576
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