Pollsters are concerned about declining levels of cooperation among personscontacted in surveys. A pollster contacts 101 people in the 18-21 age bracket and findsthat 86 of them respond and 15 refuse to respond. When 243 people in the 22-29 agebracket are contacted, 209 respond and 34 refuse to respond. Assume that 1 of the344 people is randomly selected. Find the probability of getting someone in the 22-29age bracket or someone who agreed to respond.Report the answer as a percent rounded to one decimal place accuracy. You need notenter the "%" symbol.P(22-29 or agreed) =%

Contingency table Agreed = ARefused = BTotal18-21 age = C861510122-29 age = D20934243Total29549344

Answered: Pollsters are concerned about declining…

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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13 percent of the patients in a study reported previous episodes of a stroke. Use 13 percent as the estimate of the prevalence of stroke within the population. If 70 subjects are chosen at random from the population, what is the probability that 10 percent of less would report an incidence of stroke?
3. Pollsters are concerned about declining levels of cooperation among persons contacted in surveys. A pollster contacts 73 people in the 18-21 age bracket and finds that 62 of them respond and 11 refuse to respond. When 303 people in the 22-29 age bracket are contacted, 273 respond and 30 refuse to respond. Assume that 1 of the 376 people is randomly selected. Find the probability of getting someone in the 22-29 age bracket or someone who responds.Report the answer as a percent rounded to one decimal place accuracy. You need not enter the "%" symbol.P(22-29 or responds) = %
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20 Pollsters are concerned about declining levels of cooperation among persons contacted in surveys. A pollster contacts 90 people in the 18-21 age bracket and finds that 76 of them respond and 14 refuse to respond. When 254 people in the 22-29 age bracket are contacted, 232 respond and 22 refuse to respond. Assume that 1 of the 344 people is randomly selected. Find the probability of getting someone in the 18-21 age bracket or someone who refused to respond. Report the answer as a percent rounded to one decimal place accuracy. You need not enter the "%" symbol. P(18-21 or refused) = %3D (Hint: It might be helpful to organize the data into a table first.) Question Help: E Written Example Message instructor Submit Question Jump to Answer 43,324 MAR étv 280 8. esc
Pollsters are concerned about declining levels of cooperation among persons contacted in surveys. A pollster contacts 95 people in the 18-21 age bracket and finds that 81 of them respond and 14 refuse to respond. When 260 people in the 22-29 age bracket are contacted, 235 respond and 25 refuse to respond. Assume that 1 of the 355 people is randomly selected. Find the probability of getting someone in the 22-29 age bracket or someone who responds.Report the answer as a percent rounded to one decimal place accuracy. You need not enter the "%" symbol.P(22-29 or responds) =
In a recent poll of voters, 20% were displeased with both candidates. If 3 people were picked at random. find the probability that at least one liked one of the candidates.
A gender-selection technique is designed to increase the likelihood that a baby will be a girl. In the results of the gender-selection technique, 962 births consisted of 490 baby girls and 472 baby boys. In analyzing these results, assume that boys and girls are equally likely. a. Find the probability of getting exactly 490 girls in 962 births. b. Find the probability of getting 490 or more girls in 962 births. If boys and girls are equally likely, is 490 girls in 962 births unusually high?
A poll is given, showing 30% are in favor of a new building project. If 10 people are chosen at random, what is the probability that fewer than 7 of them favor the new building project?
Assume that when adults with smartphones are randomly selected, 57% use them in meetings or classes. If 30 adult smartphone users are randomly selected, find the probability that exactly 24 of them use their smartphones in meetings or classes.
Assume that when adults with smartphones are randomly selected, 37% use them in meetings or classes. If 15 adult smartphone users are randomly selected, find the probability that exactly 9 of them use their smartphones in meetings or classes.
Assume that when adults with smartphones are randomly selected, 44% use them in meetings or classes. If 30 adult smartphone users are randomly selected, find the probability that exactly 19 of them use their smartphones in meetings or classes.
A national sports equipment co-op is going to conduct a survey of its members. It knows from collecting data when members join that 68% of them identify as male. Assuming the total number of members is very large and 200 of them are randomly selected to take the survey, what’s the chance less than 60% of these randomly chosen members identify as male? Show all your work and write your answer as a percentage.

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