30 people are selected randomly from a certain town. If their mean age is 60.5 and σ = 4.6, find a 9

[jaffar]

30 people are selected randomly from a certain town. If their mean age is 60.5 and σ = 4.6, find a
95% confidence interval for the true mean age, μ, of everyone in the town.

 

[math_celebrity]

Assume a small sample t-test since sample size is 30 or less:

http://www.mathcelebrity.com/normconf.php?n=30&xbar=60.5&stdev=4.6&conf=95&rdig=4&pl=Small+Sample