The Wind Mountain archaeological site is located in southwesternNew Mexico. Wind Mountain was home to an ancient culture ofprehistoric Native Americans called Anasazi. A random sample ofexcavations at Wind Mountain gave the following depths (incentimeters) from present-day surface grade to the location ofsignificant archaeological artifacts†. Please show all steps to getanswer. 85 45 120 80 75 55 65 60 65 95 90 70 75 65 68
(a) Use a calculator with mean and sample standard deviationkeys 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 90% confidence interval for the mean depth ? atwhich archaeological artifacts from the Wind Mountain excavationsite can be found. (Round your answers to one decimal place.)
lower limit cm
upper limit cm
