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Of 380 randomly selected medical students, the average age is 26.7 years and the standard deviation...

Of 380 randomly selected medical students, the average age is 26.7 years and the standard deviation is 2.3 years. Find a 95% confidence interval for the true mean age of all medical students.
Select one:
A. 26.51 < μ < 26.89
B. 26.47 < μ < 26.93
C. 24.4 < μ < 29.0
D. 26.39 < μ < 27.01
Math   Statistics-And-Probability   
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