A clinical trial tests a method designed to increase the probability of conceiving a girl. In the study 540 babies were born, and 270 of them were girls. Use the sample data to construct a 99%confidence interval estimate of the percentage of girls born. Based on the result, does the method appear to be effective?ew an example Get more help.2SDIF11{[command option+=?|Check answer11Show AllF12}1T1Xdelet

We have given that, Sample size (n) = 540 and favorable cases (x) = 270 Then, 99% confidence…

Answered: A clinical trial tests a method…

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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Audio cassette tapes of a particular brand are claimed by the manufacturer to give, on average, at least 60 minutes of playing time. After receiving some complaints, the manufacturer’s quality control manager obtains a random sample of 64 tapes and measures the playing time, t minutes, of each. The results are summarized by∑t=3953.28 and ∑t²=244,557.00 Construct a symmetric 99% confidence interval for the population mean playing time of the brand of tape.Does the confidence interval support the customer’s complaints? Give a reason for your answer.
Hospitals must keep enough antibiotics on hand to treat infectious diseases. Researchers want to determine whether the infectious disease rate is higher in some months than in others. To find out, researchers took a sample of 192 hospital patients in January and found 32 were being treated for an infectious disease. In an independent sample of 403 patients admitted in May, 34 were treated for an infectious disease. Find a 90% confidence interval for the difference in the infectious disease admission rates in January and in May. a. (.035, .153) b. (.033, .133) c. (.066, .179) d. (.013, .198)
A clinical trial tests a method designed to increase the probability of conceiving a girl. In the study 410 babies were born, and 328 of them were girls. Use the sample data to construct a 99% confidence interval estimate of the percentage of girls born. Based on the result, does the method appear to be effective? __ < p < __ Does the method appear to be effective? __ yes, the proportion of girls is significantly different from 0.5. __no, the proportion of girls is not significantly different from 0.5.
Hard times in June 2010, a random poll 800 working men found that 9% had taking on a second job to help pay the bills. (www.careerbuilder.com) a) Estimate the true percentage of men that are taking on new jobs by constructing a 95% confidence interval. b) A pundit on a tv news sshow claimed that only 60% of working men had a second job. Use your confidence interval test whether his claim is plausible given the poll data.
A clinical trial tests a method designed to increase the probability of conceiving a girl. In the study 520 babies were born, and 286of them were girls. Use the sample data to construct a 99% confidence interval estimate of the percentage of girls born. Based on the result, does the method appear to be effective? ________________________<p<______________________ does the method appear to be effective?
a clinical trial tests a method designed to increase the probability of conceiving a girl. In the study360 babies were born, and 306 of them were girls. Use the sample data to construct a 99%confidence interval estimate of the percentage of girls born. Based on the result, does the method appear to be effective? ____<P<_____ does the method appear to be effective?
A clinical trial tests a method designed to increase the probability of conceiving a girl. In the study, 430 babies were born, and 344 of them were girls. Use the sample data to construct a 99% confidence interval estimate of the percentage of girls born. Based on the result, does the method appear to be effective? ___<p<____ Does the method appear to be effective?
Safety. Observers in Texas watched children at playin eight communities. Of the 814 children seen biking,roller skating, or skateboarding, only 14% wore a helmet.a) Create and interpret a 95% confidence interval.b) What concerns do you have about this study thatmight make your confidence interval unreliable? c) Suppose we want to do this study again, picking vari-ous communities and locations at random, and hope to end up with a 98% confidence interval having amargin of error of {4,. How many children mustwe observe?
An employment recruitment firm is interested in knowing what percentage of workers is routinely late for work. An employee of the firm surveys a random sample of 65 people who have hired the firm that week to help them find employment. She asks them whether they were late for work more than 2 times a month, on average, in their last position. Of the 65 people, 17 respond that they were late for work more than 2 times a month, on average, in their last position. The employee constructs a 95% confidence interval for the proportion of workers who were late for work more than 2 times a month, on average, in their last position and obtains the interval (0.160, 0.385). Which of the following is the best example of a source of error that may cause the interval not to contain the true proportion of workers who were late more than 2 times a month, on average, in their last position? A. The sample only is representative of the people who hired the firm that week, and other workers may be…
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Hard times In June 2010, a random poll of 800 workingmen found that 9% had taken on a second job to help paythe bills. (www.careerbuilder.com)a) Estimate the true percentage of men that are taking onsecond jobs by constructing a 95% confidence interval.b) A pundit on a TV news show claimed that only 6% of working men had a second job. Use your confi-dence interval to test whether his claim is plausible given the poll data.

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A clinical trial tests a method designed to increase the probability of conceiving a girl. In the study 540 babies were born, and 270 of them were girls. confidence interval estimate of the percentage of girls born. Based on the result, does the method appear to be effective?