SOLUTION: Assume that the average age of students at a local community college is normally distributed. If a sample of size n=12 has a mean of 27.8 with a standard deviation of 4.1, find a 9
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Question 881161: Assume that the average age of students at a local community college is normally distributed. If a sample of size n=12 has a mean of 27.8 with a standard deviation of 4.1, find a 95 percent confidence interval.
(Note: this is a t-CI) Answer by ewatrrr(24785) (Show Source):
You can put this solution on YOUR website! Re TY
E = t*s/sqrt(n)
degree of freedom is 11, t = 2.201 at 95% confidence interval (Use table)
ME = 2.20(4.1/sqrt(12))
CI: 27.8-ME < u < 27.8 + ME
