An article published in the Canadian Journal of Zoology presented a method for estimating the body fatpercentage of North American porcupines; the method was illustrated with a sample of n = 25 porcupines.Based on this sample, a 95% bootstrap confidence interval for the average body fat percentage ofporcupines is 17.4% to 25.8%. Which of the following null hypotheses would be plausible based on thisconfidence interval?Ο Ho: μ = 34.2%Ho: μ = 17.1 %O Ho: 20.7%=Ho: μ = 15.7%

We have given 95% confidence interval for the average body fat percentage of porcupines is 17.4% to…

Answered: An article published in the Canadian…

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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From a simple random sample of 400 of the 1,395 colleges in our population, it was found that business statistics was a two-semester course in 141 of the sampled colleges. Estimate the proportion of all colleges for which the course is two semesters long, and find a 90% confidence interval.
Mrs. Voorhees claims that a Bowie knife is the most effective method of disposing rowdy campers. In a random sample of campers at Lake Crystal, a statistician found that a 99% confidence interval for the proportion of campers disposed by a Bowie knife is 0.7326 to 0.8154. Which of the following is the correct interpretation for this confidence interval? A. We are 99% confident that the population proportion of campers disposed by a Bowie knife will be within the interval. B. 99% of the time, the sample proportion of campers disposed by a Bowie knife will be in the interval. C. There is a 99% probability that the population proportion of campers disposed by a Bowie knife will be within the interval. D. We are 99% confident that the sample proportion of campers disposed by a Bowie knife will be within the interval.
After reporting the results from a formal hypothesis test, it is often likely that statisticians will report a confidence interval in order to indicate that a null value is present, indicating a significant response . True False
In an article in the Journal of Advertising, Weinberger and Spotts compare the use of humor in television ads in the United States and the United Kingdom. They found that a substantially greater percentage of U.K. ads use humor.a. Suppose that a random sample of 400 television ads in the United Kingdom reveals that 142 of these ads use humor. Find a point estimate of and a 95 percent confidence interval for the proportion of all U.K. television ads that use humor.b. Suppose a random sample of 500 television ads in the United States reveals that 122 of these ads use humor. Find a point estimate of and a 95 percent confidence interval for the proportion of all U.S. television ads that use humor.c. Do the confidence intervals you computed in parts a and b suggest that a greater percentage of U.K. ads use humor? Explain.
Suppose that a 95% confidence interval for a population p = the population proportion of men who reported contracting influenza, with a sample of 19,000 men is the following: How large is the margin of error for men reporting influenza?
If a 95% confidence interval for μ is calculated to be (21.4 , 27.9) , what would be the result of a hypothesis test at a 5% significance level performed on the set of hypotheses? H0: μ=27 vs H1: μ≠27

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