Hypothesis Testing1.A random sample of 250 patients from a hospital (Y) has a weight of 132 pounds. Fromprevious experience, the standard deviation of weights in this hospital is at 25 pounds. Anotherhospital (Z), meanwhile, provided a random sample of 300 patients with a mean of 120 poundsand standard deviation of 45 pounds. Is there a significant difference between the two hospitalsin terms of population mean weight, at 0.10 level of significance?

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Answered: Hypothesis Testing 1. A random sample…

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 manufacturer of bolts has a quality control policy that requires it to destroy any bolts that are more than 2 standard deviations from the mean. A sample of 15 bolts were tested and their variance was recorded to be 10. Stating any assumptions you need to make, test, at the 5% level, whether the bolts are meeting the established standard.
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13
A group of students (large group) took a test in mathematics and the final scores have a mean of 68 and a variance of 100. If the distribution of these scores is approximately normal, then what percent of the students: i. Scored higher than 75? Should pass the test (scores > 65)? Should fail the test (scores < 65)? ii. iii.
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A sample of n = 9 scores has a variance of s2 = 144. What is the standard deviation for this sample?

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