Find margin of error and confidence interval for the population mean µ of the college graduates who have taken the statistics course if average value for sample of 25 objects is 52,620 and sample standard deviation S=10,700 . Use 95% confidence interval. (Use t-distribution)
Given, "n=25, \\mu=56250,\\sigma=10,700"
"\\alpha=0.05, t_{\\frac{\\alpha}{2}}=t_{0.025}=2.064"
Critical value is 2.064.
Margin of Error (MOE)=critical value "\\times" population standard deviation
"=2.064\\times \\dfrac{10700}{\\sqrt{25}}"
"=2.064\\times \\dfrac{10700}{5}=4416.96"
Confidence Interval "=\\mu\\pm MOE=52620\\pm 4416.96=(48233.04,57066.9)"
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