Use the confidence level and sample data to find the margin of error, E, for 2TT
If an interval estimate of the mean life, in hours, of light bulbs is 100 to 280 hours, then determine the margin of error.
(a) 230 hours (b) 90 hours (c) 50 hours (d) 180 hours
Use the confidence level and sample data to find the margin of error, E, for 2TT...
Use the confidence level and sample data to find a confidence interval for estimating the population. Round your answer to the same number of decimal places as the sample mean A random sample of 87 light bulbs had a mean life of 479 hours with a standard deviation of a = 30 hours. Construct a 90% confidence interval for the mean life, ja, of all light bulbs of this type O A 472 hr < < 486 he B. 474...
1. Use the given degree of confidence and sample data to construct a confidence interval for the point) population proportion p. A survey of 865 voters in one state reveals that 408 favor approval of an issue before the legislature. Construct the 95% confidence interval for the true proportion of all voters in the state who favor approval. 0 0.438<p0.505 0 0.444 p0.500 0 0.435<p<0.508 O 0.471 p0.472 2. Use the given data to find the minimum sample size required...
Question 1) Use the confidence level and sample data to find the margin of error E. Round your answer to the same number of decimal places as the sample mean unless otherwise noted. The duration of telephone calls directed by a local telephone company: Round your answer to the nearest thousandth.
7.1 Q6 find margin of error and confidence interval Question Help Use the sample data and confidence level given below to complete parts (a) through (d) A drug is used to help prevent blood clots in certain patients. In clinical trials, among 4217 patients treated with the drug, 122 developed the adverse reaction of nausea. Construct a 90% confidence interval for the proportion of adverse reactions a) Find the best point estimate of the population proportion p. (Round to three...
Use the confidence level and sample data to find the margin of error 18) Weights of eggs: 95% confidence, n-52,-. 1.78 oz. 18) 0-0.40 oz Use the given degree of confidence and sample data to construct a confidence interval for the population me that the population has a normal distribution 19)) 19) n 30, x-85.4, s -11.5,90 percent
7.1 Q5 also find margin of error and confidence interval LORE Use the sample data and confidence level given below to complete parts (a) through (d) A research institute poll asked respondents if they felt vulnerable to identity theft. In the poll, n=1089 and x = 600 who said "yes." Use a 95% confidence level. Click the icon to view a table of scores a) Find the best point estimate of the population proportion p (Round to three decimal places...
Use the confidence interval to find the margin of error and the sample mean. (1.76,2.00) The margin of error is □ Round to two decimal places as needed.) The sample mean is Type an integer or a decimal.) Find the minimum sample size n needed to estimate μ for the given values of c. and E. cz 0.90, ơ 7.9, and E-2 Assume that a preliminary sample has at least 30 members. n-Round up to the nearest whole number )
Use the margin of error of 4, confidence interval of 90% and ?=28 to find the minimum sample size required to estimate an unknown population mean ?.
confidence level and sample data to find confidence interval for estimating a population round your answer to the same number of decimal places as a sample Question 2 2 pts Assume that a sample is used to estimate a population proportion p. Find the margin of error E that corresponds to the given statistics and confidence level. Round the margin of error to four decimal places. 90% confidence; n 390, x-146
Use the confidence interval to find the estimated margin of error. Then find the sample mean. A biologist reports a confidence interval of (4.1.5.3) when estimating the mean height (in centimeters) of a sample of seedlings. The estimated margin of error is The sample mean is