How much do wild mountain lions weigh? Adult wild mountain lions (18

months or older) captured and released for the first time in the San Andres Mountains gave the following weights (pounds):
68 107 134 121 60 64
Assume that the population of x values has an approximately normal distribution.
(a) Use a calculator with mean and sample standard deviation keys to find the sample mean weight x and sample standard deviation s. (Round your answers to one decimal place.)
x =  lb
s =  lb

(b) Find a 75% confidence interval for the population average weight μ of all adult mountain lions in the specified region. (Round your answers to one decimal place.)
lower limit    lb
upper limit    lb

12. 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 90% 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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