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Answer to Question #168665 in Statistics and Probability for ssqde
Question #168665
determine a 95% confidence interval for the mean of a normal population with variance 6.25
Expert's answer
Standart deviation S = "\\sqrt{6.25}" = 2.5
From the standard normal (Z-) distribution, z*-value of confidence level 95% is 1.96
"\\bar{x} \u00b11.96\\frac{\\sigma}{\\sqrt{n}}"
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