Based on a poll, 68% of Internet users are more careful about personal information when using a public Wi-Fi hotspot. What is the probability that among four randomly selected Internet users, at least one is more careful about personal information when using a public Wi-Fi hotspot? How is the result affected by the additional information that the survey subjects volunteered to respond?

Based on a poll, 68% of Internet users are more careful about personal information when using a public Wi-Fi hotspot. What is the probability that among four randomly selected Internet users, at least one is more careful about personal information when using a public Wi-Fi hotspot? How is the result affected by the additional information that the survey subjects volunteered to respond?

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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Based on a poll, 67% of Internet users are more careful about personal information when using a public Wi-Fi hotspot. What is the probability that among three randomly selected Internet users, at least one is more careful about personal information when using a publicWi-Fi hotspot? How is the result affected by the additional information that the survey subjects volunteered to respond?
Migraine medication was administered to patients in that 2% experienced weight gain as a side effect. If a random sample of 30 patients were chosen what is the probability that exactly 5 experienced weight gain as a side effect?
It is reported that 20% of the buildings in a city, have isolation coating. What is the probability that among the randomly chosen 29 buildings 23 will not have coating?
Migraine medication was administered to patients in that 12% experienced weight gain as a side effect. If a random sample of 15 patients were chosen what is the probability that exactly 4 experienced weight gain as a side effect?
In a particular survey of internet users, 3616 respondents say that they use social networking sites and 1464 respondents say that they do not use social networking sites. What is the probability that a randomly selected person uses a social networking site? Does that result suggest that it is likely (with a probability of 0.5 or greater) for someone to use social networking sites?
Previously, an organization reported that teenagers spend 8.5 hours per week, on average, on the phone. The organization thinks that, currently, the mean is higher. Twenty-three randomly chosen teenagers were asked how many hours per week they spend on the phone, with the following results (in hours): 8.3, 8.5, 10.5, 2.9, 6.7, 7.7, 13.8, 7.8, 8.7, 11.8, 12, 6.1, 5.4, 5.8, 8.5, 7.9, 10.1,11.1, 11.6, 12.9, 3.6, 6.4, 11.2 Perform a hypothesis test using a 3% level of significance. Step 1: State the null and alternative hypotheses. Ho: ??v H: ? v ? v (So we will be performing a Select an answer v test.) Step 2: Assuming the null hypothesis is true, determine the features of the distribution of point estimates using the Central Limit Theorem. v with By the Central Limit Theorem, we know that the point estimates are Select an answer and distribution standard deviation distribution mean Step 3: Find the p-value of the point estimate. P? v? v = P(| ? ♥| ? v
What is the probability that a randomly selected participant tasted apples and preferred non-organic?
19 people apply for a job as assistant manager of a restaurant. 10 have completed college and the rest have not. If the manager selects 11 applicants at random, find the probability that 6 are college graduates. What is the mean number of applicants who did not complete college? What is the variance for the applicants who did not complete college?
It is known that only 20% of college football players are considered as strong candidates for the professional league after graduation. If 15 college players are randomly and independently sampled, what is the probability that less than 3 will be considered as strong candidates for the professional league? A. 0.602 B. 0.648 O C. 0.352 D. 0.398
62% of Armenian students own a personal computer. What is the probability that the proportion of students that do not have personal computer in the sample of 25 students is less than 40%?
Please explain...
Previously, an organization reported that teenagers spend 12.5 hours per week, on average, on the phone. The organization thinks that, currently, the mean is lower. Twenty-three randomly chosen teenagers were asked how many hours per week they spend on the phone, with the following results (in hours): 10.4, 10.4, 17.3, 11.2, 10, 15.2, 9.5, 5.8, 12.5, 11.8, 7.3, 10.6, 11.5, 16.2, 16.5, 14.3, 12.3, 9.9, 13.7, 8.6, 11.3, 13, 16.5 Perform a hypothesis test using a 10% level of significance. Step 1: State the null and alternative hypotheses. Ho: pv 12.5 12.5 (So we will be performing a left-tailed Vv test.) Step 2: Assuming the null hypothesis is true, determine the features of the distribution of point estimates using the Central Limit Theorem. By the Central Limit Theorem, we know that the point estimates are t-distributed with distribution mean and distribution standard deviation Step 3: Find the p-value of the point estimate. = P(tv sv p-value = Step 4: Make a Conclusion About the nulI…