Question 669607
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Hi,
25 27 31 33 26 28 38 41 24 32 35 40 , m = 31.6667
 s = 5.8827, the sample of 12 standard deviation
95% confidence interval , z = 2.2 for a sample size of 12 (degree of freedom= 11)
ME = {{{2.2*5.8827/sqrt(12)}}}
  31.6667 - ME < {{{mu}}} < 31.6667 + ME