18.10 Reducing snoring. Snoring is an extremely common and burdensome con-4.dition that occurs when vibrating soft tissue obstructs the upper airway duringsleep. Researchers investigated the effectiveness of throat exercises designed toSTEPstrengthen that soft tissue. They recruited otherwise healthy adult patients whohad recently sought medical care for a primary complaint of snoring. At random,the subjects were divided into two treatment groups, with the treatments lastingfor three months. The control group was asked to perform deep breathing exer-cises daily and to sleep with a nasal dilator strip. The therapy group was instructedto perform a series of throat exercises three times a day. After these three months,subjects were recorded during sleep to assess their snoring frequency (in numberof snores per hour). Here are the findings:12Hn Control6 18 23 46 55 7526 6139 174 198 218 223 294 420 527 540 63769 87 101Ud Treatment7 10 18 27 51 52 53104 141 155 182 222 256 389 416 626Does the study provide significant evidence that throat exercises are better thannasal strips and breathing exercises in addressing snoring in this population?Follow the four-step process, making sure to check the conditions for inference. Alternative hypothesis: Difference of means >Difference of means = 0Null hypothesis:Alternative hypothesis: Difference of meaneSample MeanStd DevHSAM3.4442.506CON1832.301df:14.92Difference of means :0.4444t statistic:0.4463P-value:0.330918.13 What is the value of the test statistic for thistwo-sample t test?(a) 0(b) 0.4463(c) 12.92

We have given that Null hypothesis : difference of means = Alternative hypothesis : difference of…

Answered: Difference of means = 0 Null…

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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An engineer has designed a valve that will regulate water pressure on an automobile engne. The valve was tested on 130 engines and the mean pressure was 5.1 Ibs/square inch. Assume the variance is known to be 0.25 if the valve was designed to produce a mean pressure of 5 lbs/square inch, is there sufficient evidence at the 0.05 level that the valve performs above the specifications? State the null and alternative hypotheses for the above scenario Answer Ho H₂ Tables Keypad Keyboard Shortcuts
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Difference of means = 0 Null hypothesis: Alternative hypothesis: Difference of means Sample Mean Std Dev 3.444 2.506 HSAM 18 3 2.301 CON 14.92 df: 0.4444 Difference of means: 0.4463