98% confidence the sample size is 800 of which 40% are sucess
98% confidence the sample size is 800 of which 40% are sucess
Homework Answers
19. 98% confidence; the sample size is 1068, of which 25% are successes. 20. 90% confidence;...
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?
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...
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...
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
Question 18 9 pts Based on a sample of size 19, a 98% confidence interval for...
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...
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...
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...
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 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...
a simple random sample of size n is drawn. the sample mea, x, is found to...
a simple random sample of size n is drawn. the sample mea, x, is found to be 35.1 and the sample standard deviation, s, is found to be 8.7. c) construct a 98% confidence interval for u if the sample size, n, is 40. compare the results to those obtained in part (a). how does increasing the level of confidence affect the margin of error E? d) if the sample size is n=18, what conditions must be satisfied to compute...
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.
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
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.
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...
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