The Wind Mountain archaeological site is located in southwestern New Mexico. Wind Mountain was home to a culture of prehistoric Native Americans called Anasazi. A random sample of excavations at Wind Mountain gave the following depths (in centimeters) from present-day surface grade to the location of significant archaeological artifacts:

(a) Use a calculator with mean and sample standard deviation keys to verify that ‰ˆ 74.2 cm and s ‰ˆ 18.3 cm.
(b) Compute a 95% confidence interval for the mean depth μ at which archaeological artifacts from the Wind Mountain excavation site can be found.

Transcribed Image Text:

85 45 120 80 5 55 65 60 65 95 90 70 75 65 68