Question

The method of tree-ring dating gave the following years A.D. for an archaeological excavation site. Assume that the population of x values has an approximately normal distribution.

1,2781,2501,2991,2921,2681,3161,2751,3171,275

(a)

Use a calculator with mean and standard deviation keys to find the sample mean year x and sample standard deviation s. (Round your answers to the nearest whole number.)

x

= A.D.s= yr

(b)

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.)

lower limit A.D.upper limit A.D.

Answer 1

https://drive.google.com/file/d/1duR2PQdIana-NSQHplHuU4V1V7tt6G5V/view?usp=sharing