Answers only is fine!
c = 0.95, σ =2.4, n = 8.1
Level of Confidence. zc
90% 1.645
95% 1.96
99% 2.575
c=0.98, x=9.5, σ=0.3, and n= 52
c=0.95, σ=5.7, and E=2. Assume that a preliminary sample has at least 30 members.
c=0.95, σ=5.6, and E=2. Assume that a preliminary sample has at least 30 members.
Answers only is fine! Find the critical value zc necessary to form a confidence interval at...
Answers only is okay! Construct the indicated confidence interval for the population mean μ using the t-distribution. Assume the population is normally distributed. c=0.99, x=13.1, s=3.0, n= 6 Construct the indicated confidence interval for the population mean μ using the t-distribution. Assume the population is normally distributed. c=0.95, x=14.5, s=0.55, n= 15 Use the given confidence interval to find the margin of error and the sample mean. (12.7,19.9The sample mean is In a random sample of 18 people, the mean...
Construct the confidence interval for the population mean μ c: 0.95, x-16.8, σ: 9.0, and n-100 A 95% confidence interval for μ is OD (Round to one decimal place as needed.) 6.1.27 Use the confidence interval to find the margin of error and the sample mean (1.58,2.06) The margin of error is (Round to two decimal places as needed) 6.1.31 Find the minimum sample size n needed to estimate μ for the given values of c, o, and E. cz...
Find the critical value Zc necessary to form a confidence interval at the level of confidence shown below. c = 0.83 Zc = _______ (Round to two decimal places as needed.)
find z sc Construct the confidence interval for the population mean μ 0.95, x 5.2, σ 0.4, and n 58 A 95% confidence interval for μ is D (Round to two decimal places as needed)
Find the critical values x?and XR for the given confidence level c and sample size n. C=0.8, n=30 xL= (Round to three decimal places as needed.) Find the critical values x and x for the given confidence level c and sample size n. c=0.9, n=21 x?L= (Round to three decimal places as needed.) Use technology to construct the confidence intervals for the population variance o2 and the population standard deviation o. Assume the sample is taken from a normally distributed...
11. Do one of the following, as appropriate: (a) Find the critical value z a, (b) find the critical value (ipoint tap, (c) state that neither the normal nor the t distribution applies. 99%; n = 17, σ is unknown; population appears to be normally distributed. O zan 2.583 O tan a/2 -2.898 O ta/2-2921 O za/2#2567 12. Do one of the following, as appropriate: (a) Find the critical value za/2, (b) find the critical value (point) tan,(c) state that...
10. Fill in the blank. In developing a 96% confidence interval estimate for some normal population mean μ, the population standard deviation σ was 10, The interval estimate was found to be 12.6 ±3.64. Had σ equaled 5, the interval estimate would be 12. Based on a sample of size n 21 drawn from a normal population, the sample mean and sample standard deviation are, respectively, 15.68 and 1.36. We use T-test to test Ho : μ 15 vs H1...
SHORT ANSWER. Write the word or phrase that best comple tes each statement or answers the question. Use the given information to find the minimum sample size required to estimate an unknown population mean 7) Margin of error: $135, confidence level: 95%, σ-S500 MULTIPLE CH OICE. Choose the one alternative that best completes the statement or answers the question. Use the given degree of confidence and sample data to construct a confidence interval for the population mean μ Assume that...
Find the critical value tą to be used for a confidence interval for the mean of the population in each of the following situations. (a) a 95% confidence interval based on n = 18 observations (b) a 90% confidence interval from an SRS of 28 observations (c) an 80% confidence interval from a sample of size 80
Given the confidence interval for a mean of (74.5738,77.4262), from a sample of size 34 with a population standard deviation of σ=3.6, find the following: Margin of Error(ME)= Standard Error(SE)= Zc= what was the confidence level for this confidence interval?= (Show your work please)