Nutrient deficiencies exist extensively among many members of the U.S population. Morespecifically, a research company claims that 90% of the U.S. population is Vitamin D deficient. Askeptical member of this research company decides to test this claim. He collects a random sampleof 100 individuals from the U.S. population and determines that 84 individuals in the sample areVitamin D deficient. Is there evidence that the true proportion of Vitamin D deficient individualshas decreased at the 0.01 significance level?The 99% confidence interval for the proportion of U.S. individuals who are Vitamin Ddeficient obtained based on the sample will...O contain 0.90 (the null value) in the interval.NOT contain 0.90 (the null value) in the interval.

From the question, we can identify the following values:Sample size (n) = 100Number of successes (x)…

Answered: Nutrient deficiencies exist extensively…

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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Socially conscious investors screen out stocks of alcohol and tobacco makers, firms with poor environmental records, and companies with poor labor practices. Some examples of "good," socially conscious companies are Johnson and Johnson, Dell Computers, Bank of America, and Home Depot. The question is, are such stocks overpriced? One measure of value is the P/E, or price-to-earnings ratio. High P/E ratios may indicate a stock is overpriced. For the S&P Stock Index of all major stocks, the mean P/E ratio is ? = 19.4. A random sample of 36 "socially conscious" stocks gave a P/E ratio sample mean of x = 17.7, with sample standard deviation s = 5.2. Does this indicate that the mean P/E ratio of all socially conscious stocks is different (either way) from the mean P/E ratio of the S&P Stock Index? Use ? = 0.05. (a) What is the level of significance?State the null and alternate hypotheses. H0: ? = 19.4; H1: ? < 19.4H0: ? ≠ 19.4; H1: ? = 19.4 H0: ? = 19.4; H1: ? ≠ 19.4H0: ?…
3. Researchers Regine Dilla and associates wanted to determine whether consumption of cola is associated with lower bone mineral density. They looked at 1125 men and 1413 women in the Framingham Osteoporosis Study, which is a cohort that began in 1971. The first examination in this study began between 1971 and 1975, with participants returning for an examination every 4 years. Based on results of questionnaires, the researchers were able to determine cola consumption on a weekly basis. Analysis of the results indicated that women who consumed at least one cola per day (on average) had a bone mineral density that was significantly lower at the femoral neck than those who consumed less than one cola per day. The researchers did not find this relation in men. (a)Why is this a cohort study? (b)What is the response variable in this study? What is the explanatory variable? (c)Is the response variable qualitative or quantitative?
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Socially conscious investors screen out stocks of alcohol and tobacco makers, firms with poor environmental records, and companies with poor labor practices. Some examples of "good," socially conscious companies are Johnson and Johnson, Dell Computers, Bank of America, and Home Depot. The question is, are such stocks overpriced? One measure of value is the P/E, or price-to-earnings ratio. High P/E ratios may indicate a stock is overpriced. For the S&P Stock Index of all major stocks, the mean P/E ratio is ? = 19.4. A random sample of 36 "socially conscious" stocks gave a P/E ratio sample mean of x = 17.8, with sample standard deviation s = 5.8. Does this indicate that the mean P/E ratio of all socially conscious stocks is different (either way) from the mean P/E ratio of the S&P Stock Index? Use ? = 0.05. I need help with sketching (d) and (e)
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In an article dated April 24, 2005, USA Today reported on the 17th annual study on teen drug abuse conducted by the Partnership for a Drug-Free America. According to the survey of 8100 teens was Vicodin, with 19%-or about 8.2 million youths-reporting that they had used it to get high. OxyContin and drugs for attention-deficit disorder, such as Ritalin/Adderall, followed with 1 in 10 teens reporting that they had tried them. Is the statement about 19% of youths abusing Vicodin inferential or descriptive? Is the statement about about 8.2 million youths abusing Vicodin inferential or descriptive?
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