Other things being equal, the margin of error of a confidence interval increases as thea. sample size increases.b. sample mean increases.confidence level increases.C.d. confidence level decreases.none of the above.е.An SRS of 100 postal employees found that the average time these employees had worked for thepostal service was x 7 years with standard deviation s 2 years. Assume the distributi on of the timethe population of employees have worked for the postal service is approximately Normal. Which ofthe following gives the correct 95% confidence interval for the mean time u the population of postalservice employees have worked for the postal service?7 2%3Da.b. 7 1.9847 0.525C.d. 7 0.47 0.2e.

The margin of error is defined as E = (Critical value) × Std. Error of estimate Note : Since you…

Answered: Other things being equal, the margin of…

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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PLEASE SHOW WORK.
Explain also how you use Z table ..
You are interested in finding a 90% confidence interval for the mean number of visits for physical therapy patients. The data below show the number of visits for 13 randomly selected physical therapy patients. Round answers to 3 decimal places where possible. 15 26 28 28 14 11 18 20 5 19 15 14 19 a. To compute the confidence interval use a Correct distribution. b. With 90% confidence the population mean number of visits per physical therapy patient is between and visits. c. If many groups of 13 randomly selected physical therapy patients are studied, then a different confidence interval would be produced from each group. About percent of these confidence intervals will contain the true population mean number of visits per patient and about percent will not contain the true population mean number of visits per
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Other things being equal, the margin of error of a confidence interval increases as the a. sample size increases. b. sample mean increases. confidence level increases. с. d. confidence level decreases. none of the above. e.