4 and 5 Answer the following.1. Find tæ/2 for a 99% confidence interval of a sample withsize 20.2.Find tæ/2 for a 95% confidence interval of a sample with size10.3. Find the 99% confidence interval for a sample with n=17,X=7.6, and s=2.3.4. A sample composed of 20 male senior high schoolstudents were taken randomly from a normally distributedpopulation. Their heights were taken, and it was found outthat the mean is 65 inches with a standard deviation of 2.15inches. With 99% confidence, find an interval estimate for thepopulation mean.5. A certain sample whose size is 10 is known to have amean of 73.25 with a standard deviation of 2.5. Find tx/2 fora 95% confidence interval.

Answered: Image /qna-images/answer/6c8dc7b5-0d7e-4ea4-9237-77d0a1a86128.jpg

Answered: Answer the following. 1. Find tæ/2 for…

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 30 month study is conducted to determine the difference in rates of accidents per month between two departments in an assembly plant. If a sample of 12 from the first department averaged 12.3 accidents per month with a standard deviation of 3.5, and a sample of 9 from the second department averaged 7.6 accidents per month with standard deviation of 3.4, find: The t-value for a 95% confidence interval is: A. 2.09302 B. 1.724718 C. 2.08596 D. 1.729133 E. none of the preceding
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find the value: t a2and n = 15 for the 98% confidence interval for the mean. t a2and n= 20 for the 95% confidence interval for the mean.
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The director of the rabies control section in a city health department wishes to draw a sample from the department's records of dog bites reported during the past year in order to estimate the mean age of persons bitten. He wants a 95 percent confidence interval, he will be satisfied to let E = 2.5, and from previous studies he estimates the population standard deviation to be about 15 years. How large a sample should be drawn?
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