Partner Entry | Roge... Army NG G1 Portal 1. [-/1 Points] DETAILS BBBASICSTAT8 8.R.012.S. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER 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 LO USE SALT (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 four decimal places.) X = cm S = cm (b) Compute a 90% confidence interval for the population mean u of rim diameters for such ceramic vessels found at the Wind Mountain archaeological site. (Round your answers to one decimal place.) lower limit cm upper limit em Need Help? Read It Watch Ityer Bill of Rig... Screenshot of the F... Partner Entry | Roge... Army NG G1 Portal 3. [-/6 Points] DETAILS BBBASICSTAT8 8.1.015.MI. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER Allen's hummingbird (Selasphorus sasin) has been studied by zoologist Bill Alther. I Suppose a small group of 14 Allen's hummingbirds has been under study in Arizona. The average weight for these birds is x = 3.15 grams. Based on previous studies, we can assume that the weights of Allen's hummingbirds have a normal distribution, with o = 0.30 gram. (a) Find an 80% confidence interval for the average weights of Allen's hummingbirds in the study region. What is the margin of error? (Round your answers to two decimal places.) lower limit upper limit margin of error (b) What conditions are necessary for your calculations? (Select all that apply.) O uniform distribution of weights O o is known O normal distribution of weights O n is large O . is unknown (c) Interpret your results in the context of this problem. We are 80% confident that the true average weight of Allen's hummingbirds falls within this interval. O We are 20% confident that the true average weight of Allen's hummingbirds falls within this interval. 7:46 PM 11/27/2022er Entry | Roge... Army NG G1 Portal 5. [-/4 Points] DETAILS WAS BBBASICSTAT8 8.2.013. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER The method of tree ring dating gave the following years A.D. for an archaeological excavation site. Assume that the population of x values has an approximately normal distribution. 1306 1250 1187 1313 1268 1316 1275 1317 1275 ( a ) Use a calculator with mean and standard deviation keys to find the sample mean year x and sample standard deviation s. (Round your answers to the nearest whole number.) X = A. D. S = yr (b) Find a 90% confidence interval for the mean of all tree ring dates from this archaeological site. (Round your answers to the nearest whole number.) lower limit A.D. A.D. upper limitTaxpayer Bill of Rig.... Screenshot of the F.. Partner Entry | Roge... Army NG G1 Portal 2. [-/1 Points] DETAILS BBBASICSTAT8 8.R.008. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER Anystate Auto Insurance Company took a random sample of 354 insurance claims paid out during a 1-year period. The average claim paid was $1580. Assume o = $244. Find a 0.90 confidence interval for the mean claim payment. (Round your answers to two decimal places.) lower limit LA upper limit $ Find a 0.99 confidence interval for the mean claim payment. (Round your answers to two decimal places.) lower limit $ upper limit $ Need Help? Read It