Based on a poll, 70% 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 personalinformation when using a public Wi-Fi hotspot? How is the result affected by the additional information that the surveysubjects volunteered to respond?The probability that at least one of them is careful about personal information is(Round to three decimal places as needed.)

Given that,(i) 70% of internet users are careful about personal information when using public…

Answered: Based on a poll, 70% of Internet users…

A First Course in Probability (10th Edition)

10th Edition

ISBN:9780134753119

Author:Sheldon Ross

Publisher:Sheldon Ross

Chapter1: Combinatorial Analysis

Section: Chapter Questions

Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...

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The 2012 National Survey on Drug Use and Health estimated that 25% of canadians agd 12 or over reported binge drinking in the past month. Find the odds of binge drinking
According to a recent survey, 78% of web users share their password with others. Consider a random selection of 45 users and denote the proportion of them sharing their password as p. a. Calculate the mean and the standard error for p. b. Describe the sampling distribution of p and draw a graph of this probability distribution with its mean and standard deviation. c. What is the probability that less than 90% of them are sharing their password with others? d. What is the probability that more than 60% of them are sharing their password with others?
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
Below are the numbers of patients classified as underweight, normal weight, overweight and obese according to their diabetes status. If a patient is selected at random: What is the probability that they are overweight? What is the probability that they are obese and diabetic? What proportion of the diabetics are obese? What proportion of normal weight patients are not diabetic? What proportion of patients are normal weight or underweight? Underweight Normal Weight Overweight Obese Row Totals Diabetic 8 34 65 43 Not Diabetic 12 85 93 40 Column Totals
A survey of property owners' opinions about a street-widening project was taken to determine if owners' opinions were related to the distance between their home and the street. A randomly selected sample of 100 property owners was contacted and the results are shown next. Opinion Front Footage For Undecided Against Under 45 feet 12 4 4 45-120 feet 35 5 30 Over 120 feet 3 2 5 What is the expected frequency for people against the project and who have over 120 feet of property foot-frontage? Select one: a. 1.1 b. 3.9 c. 5.0 d. 5.5
The National Longitudinal Study of Adolescent Health interviewed several thousand teens (grades 7 to 12). One question asked was “What do you think are the chances you will be married in the next 10 years?” Here is a two-way table of the responses by gender: Opinion Female Male Almost no chance 120 104 Some chance but probably not 141 158 A 50-50 chance 454 499 A good chance 742 729 Almost certain 1168 764 What percent of females thought that they were almost certain to be married in the next 10 years?
It is known the 60% of toddlers have too much screen time. A randome sample of 8 toddlers were examined. What is the probability that 4 have too much screen time? O a. 0.7678 O b. 0.2322 0.0573 O d. 0.30
A research team has developed a face recognition device to match photos in a database.From laboratory tests, the recognition accuracy is 95% and trials are assumed to be independent. a. If the research team continues to run laboratory tests, what is the mean number of trials untilfailure? b. What is the probability that the first failure occurs on the tenth trial?
Aleem tossed a coin 50 times and recorded the results in a frequency distribution table. Outcome Frequency Heads 22 Tails 28 What is the experimental probability of tossing a head?
b. What is the median giraffe height? ft. c. What is the Z-score for a giraffe that is 19 foot talL? d. What is the probability that a randomly selected giraffe will be shorter than 18.7 feet tall? e. What is the probability that a randomly selected giraffe will be between 19 and 19.8 feet tall? f. The 85th percentile for the height of giraffes is ft.
Pollsters are concerned about declining levels of cooperation among persons contacted in surveys. A pollster contacts 102 people in the 18-21 age bracket and finds that 87 of them respond and 15 refuse to respond. When 249 people in the 22-29 age bracket are contacted, 220 respond and 29 refuse to respond. Assume that 1 of the 351 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) = %3D (Hint: It might be helpful to organize the data into a table first.) Submit Question 17,194 7. NOV tv 17 MacBook Air
In a Pew Research Center survey of Internet users, 3732 respondents say that they use social networking sites and 1380 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?

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