Homework Answers
Answer:-
The statements a and b are correct.
The statement a is correct. Non coverage is one of the elements of coverage error arising from the imperfectness of a sampling range that does not include some portion of the population. The coverage error is a non sampling error which decreases as the sample size decreases. Therefore the non coverage error and sample size are directly related.
The statement b is correct. As the variance of mean increases the sample size decreases. The variance and the sample size are inversely related.
The statement c is not correct. The width of the confidence level decreases as the confidence level increases. The sample size and confidence level are inversely related
The statement d is not correct. The population size has little or no effect on sample size
The statement e is not correct. Tightening the margin of error will increase the sample size.
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Question 12 Which of the following would decrease the sample size? a. Decrease noncoverage error b....
1. With same level of confidence, to decrease the margin of error the sample size... a....
1. With same level of confidence, to decrease the margin of error the sample size... a. stays the same b. decreases c. increases 2. With same margin of error, as the level of confidence increases the sample size... a. decreases b. increases c. stays the same
O A. As the sample size decreases, the margin of error decreases ○ B. AS the...
O A. As the sample size decreases, the margin of error decreases ○ B. AS the sample size nonases, the margin of error stays the same. O C. As the sample size inoreases, the margin of error decreases ○ C. As te percent confdence deoreases, the size of the interval increases How does increasing the sample size affect the margin of error, E? O A. O B. As the sample size increases, the margin of error stays the same. As...
When we decrease the sample size, what happens to the margin of error in the confidence...
When we decrease the sample size, what happens to the margin of error in the confidence interval? A. Become larger B. Become smaller C. Stay the same D. It depends
(C) If the confidence levels were 99.5% rather than 99.9% would the margin of error be...
(C) If the confidence levels were 99.5% rather than 99.9% would
the margin of error be larger or smaller than the result in part
(a) ? Explain.
The margin of error would be ( larger or smaller ) , since ( an
increase or a decrease ) in the confidence level will ( decrease or
increase ) the critical value z a/2.
SAT scores: A college admissions officer takes a simple random sample of 100 entering freshmen and computes their...
(6) 1.729 (a) 4301 7. How would the margin of error of a confidence interval for...
(6) 1.729 (a) 4301 7. How would the margin of error of a confidence interval for a population mean change if you increase the sample size and keep the same level of confidence? The margin of error would (a) stay the same. (c) decrease (b) increase (d) Don't choose this one
Which of the following would produce a confidence interval with a larger margin of error than...
Which of the following would produce a confidence interval with a larger margin of error than the 95% confidence interval with a sample size of 50? A. using a sample size of 100 and fix the confidence level. B. using a confidence level of 90% and fix the sample size. C. using a confidence level of 99% and fix the sample size. D. using a sample size of 500 and fix the confidence level. E. None of the above.
What is the t-value for a 90% confidence interval for the mean if the sample size...
What is the t-value for a 90% confidence interval for the mean if the sample size is 24? a. 1.984 b. 1.714 c. 2.069 d. 1.96 e. 2.306 In general, when choosing the sample size for estimating a mean, which of the following will result in a smaller margin of error (E)? a. a larger confidence level b. a smaller sample size c. a dozen glazed donuts d. a larger sample size e. a more expensive calculator
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...
7. Complete the following with increases, decreases, or remains the same. a) As the sample size...
7. Complete the following with increases, decreases, or remains the same. a) As the sample size increase, the confidence interval _______________ b) As the margin of error increases, the standard deviation _____________ c) As the confidence increases, the sample size _____________ in order to maintain the same margin of error. d) As confidence increases, the standard deviation _____________ e) As confidence level increases, the margin of error _____________
11. A simple random sample of size n is drawn. The sample mean, X, is found...
11. A simple random sample of size n is drawn. The sample mean, X, is found to be 17.9, and the sample standard deviation, s, is found to be 4.5. Click the icon to view the table of areas under the t-distribution. (a) Construct a 95% confidence interval about if the sample size, n, is 34. Lower bound: : Upper bound: (Use ascending order. Round to two decimal places as needed.) (b) Construct a 95% confidence interval about if the...
O A. As the sample size decreases, the margin of error decreases ○ B. AS the sample size nonases, the margin of error stays the same. O C. As the sample size inoreases, the margin of error decreases ○ C. As te percent confdence deoreases, the size of the interval increases How does increasing the sample size affect the margin of error, E? O A. O B. As the sample size increases, the margin of error stays the same. As...
(C) If the confidence levels were 99.5% rather than 99.9% would
the margin of error be larger or smaller than the result in part
(a) ? Explain.
The margin of error would be ( larger or smaller ) , since ( an
increase or a decrease ) in the confidence level will ( decrease or
increase ) the critical value z a/2.
SAT scores: A college admissions officer takes a simple random sample of 100 entering freshmen and computes their...
(6) 1.729 (a) 4301 7. How would the margin of error of a confidence interval for a population mean change if you increase the sample size and keep the same level of confidence? The margin of error would (a) stay the same. (c) decrease (b) increase (d) Don't choose this one
11. A simple random sample of size n is drawn. The sample mean, X, is found to be 17.9, and the sample standard deviation, s, is found to be 4.5. Click the icon to view the table of areas under the t-distribution. (a) Construct a 95% confidence interval about if the sample size, n, is 34. Lower bound: : Upper bound: (Use ascending order. Round to two decimal places as needed.) (b) Construct a 95% confidence interval about if the...
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