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A sample of 100 information systems managers had an average hourly income of $40.00 with a...
QUESTION 23 A sample of 100 information systems managers had an average hourly income of $40.00 with a standard deviation of $8.00. The standard error of the mean is a. 80. b..8. C. .08. d. 8.
A sample of 23 information system managers had an average hourly income of $40.75 with a standard deviation of $7.00. Develop a 95% confidence interval estimate for the average hourly wage of all information system managers. a. Critical value for the confidence interval = b. At 95% confidence, what is the margin of error c. upper and lower limit
An SRS of 55 lawyers from Reno, Nevada had a mean hourly salary of x= $310 and standard deviation s- $75 a. construct a 95% confidence interval for the mean hourly salary of all Reno lawyers b.find the margin of error in part a c. how large a sample would be necessary to have a margin of error of $25 with a 95% confidence level?
A random sample of 40 adults aged 25 to 34 years spent an average of $216 annually on movies The sample standard deviation is $60. a) Develop a 95% confidence interval for the average annual amount spent on movies. b) Verbally interpret the meaning of the confidence interval that you found for part a c) If the desired margin of error for the above confidence interval is $10, what size sample is necessary? using the sample standard deviation given above...
Arandom sample of 100 students had a mean grade point average (GPA) of 3.2 with a standard error of 0.02. Given below are the 90%, 95%, 98% and 99% confidence intervals (not necessarily in that order) for the mean GPA for all students. Which interval would represent the 95% confidence interval? (3.15, 3.25) (3.17.3.23) (3.16, 3.24) (3.14, 3.26)
A study of the career paths of hotel general managers sent questionnaires to an SRS of 300 hotels belonging to major U.S. hotel chains. There were 183 responses. The average time these 183 general managers had spent with their current company was 10.35 years. (Take it as known that the standard deviation of time with the company for all general managers is 1.4 years.) (a) Find the margin of error for an 80% confidence interval to estimate the mean time...
(1 point) A study of the career paths of hotel general managers sent questionnaires to an SRS of 210 hotels belonging to major U.S. hotel chains. There were 96 responses. The average time these 96 general managers had spent with their current company was 12.98 years. Take it as known that the standard deviation of time with the company for all general managers is 4.3 years. Give your answers to at least 2 decimal places, and use at least 3...
a random sample of 100 homes in the Bakersfield area showed an average value of $253,00 with a standard deviation of $11,725. We can say with 99% confidence that the mean proce of a home in Bakersfield, CA, is between _____ and ____ with a margin of error ____.
1. A random sample of 37 employees in Sweden worked an average number of 231 days per year. The sample standard deviation is 26 days. a) Develop a 95% confidence interval for the average number of work-days per year for all Swedish employees. (6 marks) b) Verbally interpret the meaning of the confidence interval that you found for part a) c) If the desired margin of error for the above confidence interval is 4 days, what size sample is necessary?...
The U.S. Energy Information Administration (US EIA) reported that the average price for a gallon of regular gasoline is $3.87. The US EIA updates its estimates of average gas prices on a weekly basis. Assume the standard deviation is $.24 for the price of a gallon of regular gasoline and recommend the appropriate sample size for the US EIA to use if they wish to report each of the following margins of error at 95% confidence. Round up to the...