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The Wind Mountain archaeological site is located in southwestern New Mexico. Wind Mountain was home to an ancient

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†.


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


(a) Use a calculator with mean and sample standard deviation keys to find the sample mean x and sample standard deviation s. (Round your answers to one decimal place.)

x =  cm 

s =  cm

 

(b) Compute a 98% confidence interval for the mean depth μ at which archaeological artifacts from the Wind Mountain excavation site can be found. (Round your answers to one decimal place.)

lower limit     cm 

upper limit     cm 

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