The monthly incomes from a random sample of faculty at a university are shown below. Monthly...
The monthly incomes from a random sample of workers in a factory are shown below. Monthly Income, in $1,000 4.0 5.0 7.0 5.0 6.0 6.0 10.0 8.0 9.0 (Please, avoid rounding intermediate steps and round your final solutions to at least 2 decimal places) Compute the 95% confidence interval for the mean monthly incomes of the workers. Provide the lower and upper bound of the interval below and give your answer in dollars. Are there any additional assumptions needed in...
4. The monthly incomes from a random sample of workers in a factory are shown below. Monthly Income (In $1,000) 4.0 5.0 7.0 4.0 6.0 6.0 7.0 9.0 a. Compute the standard error of the mean (in dollars). b. Compute the margin of error in dollars) at 95% confidence. c. Complute a 95% confidence interval for the mean of the population. Assume the population has a normal distribution. Give your answer in dollars.
In a random sample of 8 people with advanced degrees in biology, the mean monthly income was $4744 and the standard deviation was $580. Assume the monthly incomes are normally distributed. Construct a 95% confidence interval for the population mean monthly income for people with advanced degrees in biology.
In a certain town, a random sample of executives have the following personal incomes (in thousands); 35 43 29 55 63 72 28 33 36 41 42 57 38 30 Assume the population of incomes is normally distributed. Find the 95% confidence interval for the mean income.
In a current study, a random sample of 20 teachers from Texas and an independent random sample of 20 te have been asked to report their annual income. The data obtained are as follows: Annual income in dollars 35732, 37959, 43098, 21621, 40725, 27525, 27542, 43119, 42290, 48018, 36302, 41585, 37961, 44740, 35775, 27635, 45494, 33006, 50627, 45047 41760, 41471, 43483, 48834, 36943, 30975, 44291, 41084,35323, 42696, 45377, 29561, Texas indan42903, 46986, 39003, 30290, 41588, 36271, 38546, 51810 to Excel...
Suppose a random sample of size 17 was taken from a normally distributed population, and the sample standard deviation was calculated to be s = 5.0. a) Calculate the margin of error for a 95% confidence interval for the population mean. Round your response to at least 3 decimal places. b) Calculate the margin of error for a 90% confidence interval for the population mean. Round your response to at least 3 decimal places.
A local university administers a comprehensive examination to the candidates for B.S. degrees in Business Administration. Five examinations are selected at random and scored. The scores are shown below. Scores 80 90 91 62 77 a. b. Compute the mean and the standard deviation of the sample. Compute the margin of error at 95% confidence. Assume the population is normally distributed. Develop a 95% confidence interval estimate for the mean of the population. c.
In a current study, a random sample of 10 teachers from Utah and an independent random sample of 10 teachers from Oregon have been asked to report their annual income. The data obtained are as follows: Annual income in dollars Utah 27546, 44083, 28883, 51011,47816, 37664, 29782, 38427, 34392, 46246 Oregon 43533, 23624, 40005, 53129, 29843, 26674, 40323, 33644, 39229, 39894 The population standard deviations for the annual incomes of teachers in Utah and in Oregon are estimated as $6400...
The sample data below have been collected based on a simple random sample from a normally distributed population. Complete parts a and b 3 7 4 Compute a 98% confidence interval estimate for the population mean. The 98% confidence interval for the population mean is from 1 to (Round to two decimal places as needed. Use ascending order.)
In a current study, a random sample of 20 teachers from Texas and an independent random sample of 20 teachers from Indiana have been asked to report their annual income. The data obtained are as follows: Annual income in dollars 35732, 37959, 43098, 21621, 40725, 27525, 27542, 43119, 42290, 48018, 36302, 41585 7961,44740, 35775, 27635, 45494, 33006, 50627, 45047 Texas 3 41760, 41471, 43483, 48834, 36943, 30975, 44291, 41084, 35323, 42696, 45377, 29561 2903, 46986, 39003, 30290, 41588, 36271, 38546,...