shows sample proportions from samples of sizen = 180 from a population. Estimate the value of the population parameter and estimate the standard error for the sample statistic. 0.71 0.74 0.77 0.80 0.83 O36 089 Figure 1 Sompling distribution Round your answers to two decimal places. SE =

ASK YOUR TEACHER PRACTICE ANOTH 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. 1,222 1,180 1,243 1,187 1,268 1,316 1,275 1,317 1,275 n USE SALT (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 four decimal places.) X = A.D. S = yr (b) When finding an 90% confidence interval, what is the critical value for confidence level? (Give your answer to three decimal plāces.) t = What is the maximal margin of error when finding a 90% confidence interval for the mean of all tree-ring dates from this archaeological site? (Round your answer to the nearest whole number.) E = 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. upper limit A.D. Need Help? Watch It…

Use the standard normal table to find the​ z-score that corresponds to the given percentile. If the area is not in the​ table, use the entry closest to the area. If the area is halfway between two​ entries, use the​ z-score halfway between the corresponding​ z-scores. If​ convenient, use technology to find the​ z-score. P4 The​ z-score that corresponds to P4 is (Round to two decimal places as​ needed.)

Ho;p=0.77 H1;p>077 your sample consists of 136 subjects, with 100 sucesses calculate the t statistics rounded to 2 decimal places