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A random sample of 100 technology stocks earned an average of 10%. Assuming the distribution of equity returns is normal and the population standard deviation is 5%, the 95% confidence interval for the population mean is: A. 5.00% to 15.00%. B. 9.50% to 10.50%. C. 9.91% to 10.90%. D. 9.02% to 10.98%. |