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 85% 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
a)
x = 74.2
s = 18.3
b)
sample mean, xbar = 74.2
sample standard deviation, s = 18.3
sample size, n = 15
degrees of freedom, df = n - 1 = 14
Given CI level is 85%, hence α = 1 - 0.85 = 0.15
α/2 = 0.15/2 = 0.075, tc = t(α/2, df) = 1.523
ME = tc * s/sqrt(n)
ME = 1.523 * 18.3/sqrt(15)
ME = 7.196
CI = (xbar - tc * s/sqrt(n) , xbar + tc * s/sqrt(n))
CI = (74.2 - 1.523 * 18.3/sqrt(15) , 74.2 + 1.523 *
18.3/sqrt(15))
CI = (67 , 81.4)
The Wind Mountain archaeological site is located in southwestern New Mexico. Wind Mountain was home to...
20.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...
Question #1 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 Use a calculator with mean and sample standard deviation keys to find the...
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There is an archaeological study area located in southwestern New Mexico. Potsherds are broken pieces of prehistoric Native American clay vessels. One type of painted ceramic vessel is called Mimbres classic black-on-white. At three different sites, the number of such sherds was counted in local dwelling excavations. Site I Site II Site III 61 25 12 39 15 32 22 57 66 12 67 20 83 11 52 15 27 Shall we reject or not reject the claim that there...
Wind Mountain is an archaeological study area located in southwestern New Mexico. Potsherds are broken pieces of prehistoric Native American clay vessels. One type of painted ceramic vessel is called Mimbres classic black-on-white. At three different sites the number of such sherds was counted in local dwelling excavations. Shall we reject or not reject the claim that there is no difference in population mean Mimbres classic black-on-white sherd counts for the three sites? Test given Given that P-Value > 0.1,...
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Sherds of clay vessels were put together to reconstruct rim diameters of the original ceramic vessels at the Wind Mountain archaeological sitet. A random sample of ceramic vessels gave the following rim diameters (in centimeters). 15.9 13.4 22.1 12.7 13.1 19.6 11.7 13.5 17.7 18.1 (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)...
There is an archaeological study area located in southwestern New Mexico. Potsherds are broken pleces of prehistoric Native American clay vessels. One type of painted ceramic vencel in called Mimbres classic black-on-white. At three different sites, the number of such sherds was counted in local dwelling excavations Site I Site 1 site II1 18 30 71 34 20 17 78 58 26 61 15 10 shall we reject or not reject the claim that there is no difference in population...
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There is an archaeological study area located in southwestern New Mexico. Potsherds are broken pieces of prehistoric Native American clay vessels. One type of painted ceramic vessel is called Mimbres classic black-on-white. At three different sites, the number of such sherds was counted in local dwelling excavations. Site I Site II Site III 64 26 15 35 17 32 22 54 65 11 68 28 77 16 54 13 20 Shall we reject or not reject the claim that there...