3. In some tests of healthy, elderly men, a new drug has restored their memories almost to he level of young adults. The medication will soon be tested on patients with Alzheimer's disease, the atal brain disorder that eventually destroys the minds of those afflicted. According to Dr. Gary Lynch of he University of California, Irvine, the drug, called ampakine CX-516, accelerates signals between brain ells and appears to significantly sharpen memory. In a preliminary test on students in their early 20s nd on men aged 65-70, the results were particularly striking. The accompanying data are the numbers f nonsense syllables recalled after 5 minutes for ten men in their 20s and ten men aged 65-70 who had een given a mild dose of ampakine CX-516. Do the data provide sufficient evidence to conclude that there is a difference in the number of nonsense yllables recalled by men in the two age groups when older men have been given ampakine CX-516? Use he most efficient test. Explain your rationale! Make a conclusion in the context of the problem. Show he five steps. Age Group Number of syllables recalled 11 7 6 8 6 9 2 10 3 6 1 9 8 8 7 8 5 7 20s 65-70 (with ampakine CX-516) 10 3

3. In some tests of healthy, elderly men, a new drug has restored their memories almost to he level of young adults. The medication will soon be tested on patients with Alzheimer's disease, the atal brain disorder that eventually destroys the minds of those afflicted. According to Dr. Gary Lynch of he University of California, Irvine, the drug, called ampakine CX-516, accelerates signals between brain ells and appears to significantly sharpen memory. In a preliminary test on students in their early 20s nd on men aged 65-70, the results were particularly striking. The accompanying data are the numbers f nonsense syllables recalled after 5 minutes for ten men in their 20s and ten men aged 65-70 who had een given a mild dose of ampakine CX-516. Do the data provide sufficient evidence to conclude that there is a difference in the number of nonsense yllables recalled by men in the two age groups when older men have been given ampakine CX-516? Use he most efficient test. Explain your rationale! Make a conclusion in the context of the problem. Show he five steps. Age Group Number of syllables recalled 11 7 6 8 6 9 2 10 3 6 1 9 8 8 7 8 5 7 20s 65-70 (with ampakine CX-516) 10 3

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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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People gain weight when they take in more energy from food than they expend. Researchers wanted to investigate the link between obesity and energy spent on daily activity. Choose 20 healthy volunteers who don't exercise. Deliberately choose 10 who are lean and 10 who are mildly obese but still healthy. Attach sensors that monitor the subjects' every move for 10 days. The table below presents data on the time (in minutes per day) that the subjects spent standing or walking, sitting, and lying down. Is there a significant difference between the mean times the two groups spend lying down? Let ?1 be the mean time spent lying down by the lean group, and ?2 be the mean time for the obese group. Time (minutes per day) spent in three different postures by leanand obese subjects Group Subject Stand/Walk Sit Lie Lean 1 509.100 366.300 554.500 Lean 2 603.925 374.512 452.650 Lean 3 322.212 580.138 533.362 Lean 4 581.644 362.144 489.269 Lean 5…
OSE 2 Researchers conducted a study to estimate the relationship between a subject's brain activity while watching a television commercial and subject's subsequent ability to recall the contents of commercials. People think that long commercial recall is remembered by the people compared with the short one. In order to understand the difference researcher made 10 long commercial and a short one for each products and commercials are watched by the same person. Then subjects are asked what they remembered from the commercial and giving the correct answers are codded by the following table. 1 2345678910 Long Commercial Recall 108668 9786 Short Commercial Recall 4 23444462 2 Ce Test the claim that long commercials recall is more than short one (The duration of the commercial make a difference to recall). Calculate the test statistics. Maksimum 3900 karakter yazabilirsiniz.
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Suppose we are interested in the risk of peripheral neuropathy among persons with diabetes. To study this relationship, we identify 100 persons with a history of diabetes. At an initial examination, three of those 100 persons were found to have peripheral neuropathy. Five years later, the group was reexamined and 12 additional persons were found to have peripheral neuropathy. Based on that information, which of the following is closest to the five- year risk of peripheral neuropathy in this group of patients? А. О.03 В. О.07 С. О.12 D. 0.15 E. 0.17
You are concerned that nausea may be a side effect of Tamiflu, but you cannot just give Tamiflu to patients with the flu and say that nausea is a side effect if people become nauseous. This is because nausea is common for people who have the flu. From past studies you know that about 34% of people who get the flu experience nausea. You collected data on 1926 patients who were taking Tamiflu to relieve symtoms of the flu, and found that 711 experienced nausea. Use a 0.01 significance level to test the claim that the percentage of people who take Tamiflu for the relief of flu symtoms and experience nausea is greater than 34%. a) Identify the null and alternative hypotheses? Ho: ? H₁: ? b) What type of hypothesis test should you conduct (left-, right-, or two-tailed)? left-tailed right-tailed O two-tailed c) Identify the appropriate significance level. d) Calculate your test statistic. Write the result below, and be sure to round your final answer to two decimal places. e) Calculate your…
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You are concerned that nausea may be a side effect of Tamiflu, but you cannot just give Tamiflu to patients with the flu and say that nausea is a side effect if people become nauseous. This is because nausea is common for people who have the flu. From past studies you know that about 30% of people who get the flu experience nausea. You collected data on 1744 patients who were taking Tamiflu to relieve symtoms of the flu, and found that 572 experienced nausea. Use a 0.01 significance level to test the claim that the percentage of people who take Tamiflu for the relief of flu symtoms and experience nausea is greater than 30%.a) Identify the null and alternative hypotheses?�0: �1: b) What type of hypothesis test should you conduct (left-, right-, or two-tailed)? left-tailed right-tailed two-tailed c) Identify the appropriate significance level.d) Calculate your test statistic. Write the result below, and be sure to round your final answer to two decimal…
The relationship between United States unemployment and inflation rates during the Covid-19 pandemic. Background The covid-19 pandemic has led to higher unemployment rates in the United States than normal because many people were laid off jobs in response to the pandemic (Al-Fadly, 2020). It is important to analyze how such as sharp increase in unemployment affected inflation in relation to how unemployment have traditionally affected inflation. The overall relationship between unemployment and inflation has traditionally been an inverse one. It is argued that when unemployment rates are higher, the number of individuals who are looking for jobs usually becomes higher than the number of job positions that are available (Putnam & Azzarello, 2015). In such a situation, employers tend to pay lower wages because there is abundance of workers which naturally leads to a lower wage inflation. This study will examine the relationship between unemployment rates and inflation rate during…
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Fish produce a hormone called isotocin, a hormone that is similar to oxytocin in mammals. Both hormones, oxytocin and isotocin, have been linked to social behaviors including the suppression of social anxiety, trust, and attachment. Prior to this study the relationship between isotocin in the bloodstream and the amount of aggression or submission individual cichlid fish display was unknown. The researchers hypothesized that isotocin would suppress aggressive behaviors in cichlids to promote social cohesion as these fish exist in large social groups (schools). To address this hypothesis each of 10 fish were exposed to two treatments 1 week apart. One at a time a fish was randomly selected from the group of 10 and either injected with a saline solution ( that served as the control) or with isotocin. After this injection the fish was returned to its group and the amount of aggressive and submissive behaviors the fish demonstrated was recorded for the next 10 minutes. One week later this…
Researchers conducted a study to estimate the relationship between a sub brain activity while watching a television commercial and subject's subsequenk ability to recall the contents of commercials. People think that long commercial recall is remembered by the people compared with the short one. In order to understand the difference researcher made 10 long commercial and a short one for each products and commercials are watched by the same person. Then subjects are asked what they remembered from the commercial and giving the correct answers are codded by the following table. 123456789tO Long Commercial Recall 9755768676 Short Commercial Recall 3565422522 tommciai.o.oerethan aoronethe duration serecatismer Test the claim that long of the commercial iione.comm 1oit one (The duration