The union for a particular industry has determined that the **standard deviation** of the daily wages of its workers is $18. A **random sample** of 70 workers in this industry has a **mean** daily wage of $113. Find a 99% **confidence interval** for the true mean daily wage of all union workers in the industry. Then give its lower limit and upper limit.Carry your intermediate computations to at least three decimal places. Round your answers to one decimal place. (If necessary, consult a **list of formulas**.)**Lower limit:** [Input box for answer]**Upper limit:** [Input box for answer]Buttons available:- X (presumably to clear input)- Undo (to reverse the last action)- Help (for additional guidance)

Answered: Image /qna-images/answer/74efbc14-fcca-4220-91b1-639f7a9d170a.jpg

Answered: The union for a particular industry has…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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A statistics practitioner took a random sample of 49 observations from a population and computed the sample mean to be 100. For each confidence interval, enter your answer in the form (LCL, UCL). You must include the parentheses and the comma between the confidence limits. A. Suppose the population standard deviation is 28. Estimate the population mean with 95% confidence. Confidence Interval = B. Suppose the population standard deviation is 41. Estimate the population mean with 95% confidence. Confidence Interval = C. Suppose the population standard deviation is 10. Estimate the population mean with 95% confidence. Confidence Interval =
Prof. Gersch knows that the score on a standardized test is perfectly normal with unknown mean and a standard deviation of 50. He then takes a random sample of 25 tests and finds that the average of these is 200. Prof. Gersch wishes to make a 95% confidence interval for the average of all the grades.What is the upper end of the confidence interval? a. 220 b. 300 c. 298 d. 225.8 e. 329 f. 219.6
An existing inventory for a test measuring self-esteem indicates that the scores have a standard deviation of 8. A psychologist gave the self-esteem test to a random sample of 70 individuals, and their mean score was 69. Construct a 99% confidence interval for the true mean of all test scores. Then complete the table below. Carry your intermediate computations to at least three decimal places. Round your answers to one decimal place. What is the lower limit of the 99% confidence interval? What is the upper limit of the 99% confidence interval?
A particular fruit's weights are normally distributed, with a mean of 613 grams and a standard deviation of 19 grams.If you pick 20 fruits at random, then 11% of the time, their mean weight will be greater than how many grams?Give your answer to the nearest gram.
A statistics practitioner took a random sample of 42 observations from a population whose standard deviation is 30 and computed the sample mean to be 102. Note: For each confidence interval, enter your answer in the form (LCL, UCL). You must include the parentheses and the comma between the confidence limits. A. Estimate the population mean with 95% confidence. Confidence Interval = B. Estimate the population mean with 90% confidence. Confidence Interval = C. Estimate the population mean with 99% confidence. Confidence Interval =
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You are given the sample mean and the population standard deviation. Use this information to construct the 90% and 95% confidence intervals for the population mean. Interpret the results and compare the widths of the confidence intervals. From a random sample of 65 dates, the mean record high daily temperature in a certain city has a mean of 84.70°F. Assume the population standard deviation is 14.54°F.
solve correctly. I will rate accordingly.
The breaking strengths of cables produced by a certain manufacturer have a standard deviation of 109 pounds. A random sample of 150 newly manufactured cables has a mean breaking strength of 1800 pounds. Based on this sample, find a 90% confidence interval for the true mean breaking strength of all cables produced by this manufacturer. Then complete the table below. Carry your intermediate computations to at least three decimal places. Round your answers to one decimal place. (If necessary, consult a list of formulas.) What is the lower limit of the 90% confidence interval? What is the upper limit of the 90% confidence interval?
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