In a study of 415,282 cell phone users, it was found that 64 developed cancer of the brain or nervous system. Assuming that cell phones have no effect, there is a 0.000165 probability of a person developing cancer of the brain or nervous system. Wetherefore expect about 69 cases of such cancer in a group of 415,282 people. Estimate the probability of 64 or fewer cases of such cancer in a group of 415,282 people. What do these results suggest about media reports that cell phones cause cancer of thebrain or nervous system?(a) P(xs 64) = (Round to four decimal places as needed.) In a survey of 1225 people, 893 people said they voted in a recent presidential election. Voting records show that 70% of eligible voters actually did vote. Given that 70% of eligible voters actually did vote, (a) find the probability that among 1225 randomlyselected voters, at least 893 actually did vote. (b) What do the results from part (a) suggest?(a) P(X2 893) = (Round to four decimal places as needed.)

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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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According to sources 5% of currently infected COVID-19 patients are in serious or critical condition. If 2,500 individuals are (currently) infected in a small town what are the odds that 120 or more individuals are will wind up in serious or critical condition. Source as of (3/28/20): https://www.worldometers.info/coronavirus/e 1% 99% 67.6% 32.3%
Physicians at a clinic gave what they thought were drugs to 960960 asthma, ulcer, and herpes patients. Although the doctors later learned that the drugs were really placebos, 5252 % of the patients reported an improved condition. Assume that if the placebo is ineffective, the probability of a patients condition improving is 0.490.49. For the hypotheses that the proportion of improving is 0.490.49 against that it is >0.49>0.49, find the p-value. p=p=
An experiemental drug has been shown to be 75% effective in eliminating symptoms of allergies in animals studies. A small human study involve 6 participants is conducted. What is the probability that the drug is effective on half of the participants
In a genetics experiment on peas, one sample of offspring contained 436 green peas and 373 yellow peas. Based on those results, estimate the probability of getting an offspring pea that is green. Is the result reasonably close to the value of 3/4 that was expected?
A researcher takes a sample of 50 individuals and administers a background check to identify the number of prior arrests for each person. For whatever reason, one person is removed from the analysis and another random person is selected to replace that person. Having no additional information, what is your best guess of the number of prior arrests experienced by the replacement person? Why?
Apparently, depression significantly increases the risk of developing dementia later in lift (BBC News, July 6, 2010). In a recent study it was reported that 22% of those who had depression went on to develop dementia, compared to only 17% of those who did not have depression. Suppose 10% of all people suffer from depression. What is the probability of a person developing dementia? If a person has developed dementia, what is the probability that the person suffered from depression earlier in life?
In a study of 213,270 cell phone users, it was found that 77 developed cancer of the brain or nervous system. Assuming that cell phones have no effect, there is a 0.000397 probability of a person developing cancer of the brain or nervous system. We therefore expect about 85 cases of such cancer in a group of 213,270 people. Estimate the probability of 77 or fewer cases of such cancer in a group of 213,270 people. What do these results suggest about media reports that cell phones cause cancer of the brain or nervous system? (a) P(x ≤ 77) = (Round to four decimal places as needed.)
Physicians at a clinic gave what they thought were drugs to 890890 asthma, ulcer, and herpes patients. Although the doctors later learned that the drugs were really placebos, 5555 % of the patients reported an improved condition. Assume that if the placebo is ineffective, the probability of a patients condition improving is 0.530.53. For the hypotheses that the proportion of improving is 0.530.53 against that it is >0.53>0.53, find the p-value. ?=p=

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