Find a 90% confidence interval for the mean of all tree ring dates from this archaeological site. (Round your answers to the nearest whole number.)

Question

ooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooo

Answer 1

A 90% confidence interval:

mean +/- t-stat for 90% CI * standard deviation/sample size

where t-stat for 90% CI is t-stat for tail alpha = 0.05 and sample size - 1 degrees of freedom.