Pollsters are concerned about declining levels of cooperation among persons contacted in surveys. Apollster contacts 88 people in the 18-21 age bracket and finds that 75 of them respond and 13 refuse torespond. When 292 people in the 22-29 age bracket are contacted, 270 respond and 22 refuse to respond.Assume that 1 of the 380 people is randomly selected. Find the probability of getting someone in the 18-21age bracket or someone who agreed to respond.Report the answer as a percent rounded to one decimal place accuracy. You need not enter the "" symbol.P(18-21 or agreed) =(Hint: It might be helpful to organize the data into a table first.)

For the given data Find p( 18-21 or agreed ) = ?

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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Based on a smartphone survey, assume that 43% of adults with smartphones use them in theaters. In a separate survey of 241 adults with smartphones, it is found that 101 use them in theaters. a. If the 43% rate is correct, find the probability of getting 101 or fewer smartphone owners who use them in theaters. b. Is the result of 101 significantly low?
An economics professional body estimates that 80% of the students taking undergraduate economics courses are in favour of studying of statistics as part of their studies. If this estimate is correct, what is the probability that more than 790 undergraduate economics students out of a random sample of 1000 will be in favour of studying statistics?
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) = %
According to a study conducted by a statistical organization the proportion of Americans were satisfied with the way things are going in her lives .82 supposed random sample of 110 Americans is obtained. The probability that 77 or fewer Americans in the sample are satisfied is?
The probability that an adult possesses a credit card is .75. A researcher selects two adults at random. The probability that the first adult possesses a credit card and the second adult does not possess a credit card
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?
About 3% of the population has a particular genetic mutation. 900 people are randomly selected.Find the mean for the number of people with the genetic mutation in such groups of 900.
Based on a smartphone survey, assume that 43% of adults with smartphones use them in theaters. In a separate survey of 258 adults with smartphones, it is found that 110 use them in theaters. a. If the 43% rate is correct, find the probability of getting 110 or fewer smartphone owners who use them in theaters. b. Is the result of 110 significantly low?
A survey showed that 76% of adults need correction (eyeglasses, contacts, surgery, etc.) for their eyesight. If 14 adults are randomly selected, find the probability that at least 13 of them need correction for their eyesight. Is 13 a significantly high number of adults requiring eyesight correction?
Of the last 60 people who went to the cash register at a department store, 13 had blond hair, 19 had black hair, 22 had brown hair, and 6 had red hair. Determine the empirical probability that the next person to come to the register has blond hair.
Based on a smartphone survey, assume that 57% of adults with smartphones use them in theaters. In a separate survey of 264 adults with smartphones, it is found that 149 use them in theaters. a. If the57% rate is correct, find the probability of getting 149 or fewer smartphone owners who use them in theaters. b. Is the result of 149 significantly low?
Based on a smartphone survey, assume that 57% of adults with smartphones use them in theaters. In a separate survey of 224 adults with smartphones, it is found that 111 use them in theaters. a. If the 57% rate is correct, find the probability of getting 111 or fewer smartphone owners who use them in theaters.

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