What is the proper interpretation of a confidence interval for the difference in two proportions that has a negative number and a positive number, such as (-25% to +35%)? Such an interval suggests that the two proportions are quite similar, and that we cannot tell which population's proportion is higher The analyst has made an error, because such an interval cannot occar when cakulated properly We do not worry about the negative sign, and such an intervalwould have the same interpretation as (25% to 35%). Because 35 25 %, we conclude that the first proportion is higher than the

What is the proper interpretation of a confidence interval for the difference in two proportions that has a negative number and a positive number, such as (-25% to +35%)? Such an interval suggests that the two proportions are quite similar, and that we cannot tell which population's proportion is higher The analyst has made an error, because such an interval cannot occar when cakulated properly We do not worry about the negative sign, and such an intervalwould have the same interpretation as (25% to 35%). Because 35 25 %, we conclude that the first proportion is higher than the

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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The mean amount of money spent on lunch per week for a sample of 105 students is $24. If the margin of error for the population mean with a 98% confidence interval is 1.10, construct a 98% confidence interval for the mean amount of money spent on lunch per week we’re all students
True or False Q: If a 95% confidence interval for the difference in two independent means is (-4.5 to 2.1), then the point estimate is -2.1.
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Step 2 (b) Which of the two intervals conveys more precise information about the value of the population proportion? Recall that a smaller standard error of results in a narrower confidence interval. A narrower confidence interval is then more precise. The width of Interval 1, (0.27, 0.35), is 0.35 0.27 = and the width of Interval 2, (0.30, 0.34), is 0.34 -0.30 = Submit Skip (you cannot come back) Therefore, --Select--- is the narrower and more precise interval.
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Aston’s Career Service wants to find out what proportion of Aston’s students work in a part-time job. A similar survey undertaken 3 years ago found that 60% of Aston students worked in a part-time job. How many students must it include in the sample if it wants to achieve a ±4% accuracy at a 95% confidence level?
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Refer to the accompanying stayed outside and construct a 90% confidence interval as many of the mean pulse rate of adult females then do the same for adult males compare the results.
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