98% confidence the sample size is 800 of which 40% are sucess

19. 98% confidence; the sample size is 1068, of which 25% are successes. 20. 90% confidence; the sample size is 2107, of which 65% are successes.
Given a sample size of 14, what are the critical values for a 98% confidence level?
You collect a random sample of size n from a population and calculate a 98% confidence interval. Which of the following strategies produces a new confidence interval with a decreased margin of error? A.) Use a 99% Confidence level B.)Use a 95% confidence level C.)Decrease Sample Size D.)Use the same confidence level but compute the interval n time. Approximately 2% of these intervals will be larger. E.)Nothing can guarantee that you will obtain a larger margin of error. You can...
9. Given a sample size of 14, what are the critical values for a 98% confidence level? (1 point) 0 4.660, 29.141 0 3.565, 29.819 0 4.107, 27.688 e 5.009, 24.736 10. Find the critical values 22 and that correspond to a 95% confidence level and a sample size of 9 2.733, 15.507 o 1.344, 21.955 2180, 17.535 2.700, 19.023
Assume that a sample is used to estimate a population mean μμ. Find the 98% confidence interval for a sample of size 40 with a mean of 72.3 and a standard deviation of 14.5. Enter your answer as an open-interval (i.e., parentheses) accurate to one decimal place (because the sample statistics are reported accurate to one decimal place). 98% C.I. = Answer should be obtained without any preliminary rounding. However, the critical value may be rounded to 3 decimal places.
Question 18 9 pts Based on a sample of size 19, a 98% confidence interval for the mean score of all students, p. on an aptitude test is from 79.2 to 94.8. Find the margin of error Question 19 9 pts A group of 75 randomly selected students have a mean score of 25.2 on a placement test. Nationwide, the standard deviation of all students taking the test is 27. This sample data is used to calculate a 90 percent...
Assume that a sample is used to estimate a population mean y. Find the 98% confidence interval for a sample of size 72 with a mean of 47.1 and a standard deviation of 13.2. Enter your answer as an open-interval (i.e., parentheses) accurate to 3 decimal places. 98% C.I. - The answer should be obtained without any preliminary rounding.
17. If the confidence level for a confidence interval is 98%. then the error rate α is ______. a. 98% b. 2% c. 95% d. 5% 18. Suppose the sample mean is μ and the confidence interval for population mean is (μ-E, μ+E). E will be getting smaller if: (18.a) the sample size is getting ___________; a. smaller b. larger (18.b) the standard deviation of the data in the sample is __________; a. smaller b. larger (18.c) the allowed error...
A student was asked to find a 98% confidence interval for the proportion of students who take notes using data from a random sample of size n = 89. Which of the following is a correct interpretation of the interval 0.12 < p < 0.3? Check all that are correct There is a 98% chance that the proportion of notetakers in a sample of 89 students will be between 0.12 and 0.3. The proprtion of all students who take notes...
A student was asked to find a 98% confidence interval for widget width using data from a random sample of size n = 21. Which of the following is a correct interpretation of the interval 14.8 < p < 21.22 Check all that are correct. There is a 98% chance that the mean of the population is between 14.8 and 21.2. The mean width of all widgets is between 14.8 and 21.2, 98% of the time. We know this is...