(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.
c)
The margin of error would be ( smaller ) , since a decrease ) in the confidence level will decrease the critical value z a/2.
(C) If the confidence levels were 99.5% rather than 99.9% would the margin of error be...
(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
A population has standard deviation - 17.3. Part 1 of 2 (a) How large a sample must be drawn so that a 99.9% confidence interval for ji will have a margin of error equal to 3.7? Round the answer up to the nearest integer. (Round the critical value to no less than three decimal places.) A sample size of is needed to be drawn in order to obtain a 99.9% confidence interval with a margin of error equal to 3.7....
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.
6.12 Margin of error and the confidence interval. A study of stress on the campus of your university reported a mean stress level of 78 (on a 0 to 100 scale with a higher score indicating more stress) with a margin of error of 5 for 95% confidence. The study was based on a random sample of 64 undergraduates more e. The study w (a) Give the 95% confidence interval. (b) If you wanted 99% confidence for the same study,...
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
A population has standard deviation ơ-17.7. Part 1 out of 2 How large a sample must be drawn so that a 99.9% confidence interval for μ will have a margin of error equal to 1.3? Round up the answer to the nearest integer. (Round the critical value to no less than three decimal places.) A sample size of D is needed to be drawn in order to obtain a 99.9% confidence interval with a margin of error equal to 1.3...
Find the margin of error for a 95% confidence interval for estimating the population mean when the sample standard deviation equals 92, with a sample size of (a) 400,(b) 1800. What is the effect of the sample size? 2. The margin of error for a 95% confidence interval with a sample size of 400 is (Round to the nearest tenth as needed.) b. The margin of error for a 90% confidence interval with a sample size of 1600 is (Round...
If you decide you want a smaller margin of error for a confidence interval, should you increase or decrease the sample size? A) Increase B) Decrease C) Do not need to change
Notice (from the margin of error measurment determined in 3b) that we have used a sample size larger than needed in order to be sufficiently confident that the sample mean would estimate the population mean height within 4 cm; that is our margin of error at 2.17 cm was much smaller than 4 cm. Therefore, determine the smaller sample size required to predict the mean height of all FHSU stats students based upon a needed 95% confidence level with an...
heres a better picture 132 /texttornework 2001) Draw the Distribution and mark off your ample means. Conspite the Test Statistic: Calculate the p value • Do you Reject the H or Fail to Reject the H.? • Write out a statement describing your conclustion. 2.2 Confidence Interval High school students who take the SAT mathematics exam a second time generally score higher than on their first attempt. The change in score has a Normal distribution with a standard deviation y...