The PEW Research Institute recently conducted a survey of adult Americans regarding Internet shopping. The survey found that 15% ofthe respondents made a retail purchase on the Internet last week. A retailer wished to verify this claim. In a random sample of 16adults:a. What is the likelihood that exactly three adults make an Internet purchase during a week? (Round your answer to 4 decimalplaces.)Probabilityb. Of the 16 adults, how many are expected to make a purchase during a week? (Round your answer to 1 decimal place.)Expected purchasesc. What is the likelihood that three or less of the 16 adults make an Internet purchase during a week? (Round your answer to 2decimal places.)Probability< Prev13 of 17Next

It is given that 15% of the respondents made a retail purchase on the internet last week and 16…

Answered: The PEW Research Institute recently…

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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Based on a poll , among adults who regret getting tattoos, 70% say that they were too young when they got their tattoos . Assume that four adults who regret getting tattoos are randomly selected , and find the indicated probability. Find the probability that all of the selected adults say that they were too young to get tattoos Type your answer here:
100 persons are surveyed about their smoking habits. The results are shown below: Do you smoke? Male Female Total Yes 14 12 26 What is the probability that a randomly selected smoker is male? Enter the exact answer, or round the answer to three decimal places No 46 28 74 Total 60 40 100
The table below shows the results of a survey that asked the involvement of a person in a charity work. The person’s gender and response were recorded. Find the probability of selecting a female who never volunteers a.0.29 b.0.57 c.0.51 d.0,49
Here is the probability model for the blood type of a randomly chosen person in the United States: Blood Type OA BAB Probability 0.2 0.47 0.11 ?
100 persons are surveyed about their smoking habits. The results are shown below: Do you smoke? Male Female Total Yes 14 12 26 What is the probability that a randomly selected smoker is male? Enter the exact answer, or round the answer to three decimal places No 46 28 74 Total 60 40 100
Assume that 26.6% of people have sleepwalked. Assume that in a random sample of 1517 adults, 418 have sleepwalked. a. Assuming that the rate of 26.6% is correct, find the probability that 418 or more of the 1517 adults have sleepwalked. b. Is that result of 418 or more significantly high? c. What does the result suggest about the rate of 26.6%?
Three unbiased coins are tossed. What is the probability of getting at most two heads? A. 3/4B. 1/4C. 3/8D. 7/8
A poll asked people with and without children under 18 years old if they frequently experienced stress. The results are shown in the accompanying table. Complete parts (a) through (c) below. Frequently Experience Stress Yes No Total With child under 296 234 530 18 уears No child under 196 314 510 18 years Total 492 548 1040 a. Find the probability that a randomly chosen person from this group said "Yes," given that the person has a child under 18 years old. (Type an integer or decimal rounded to four decimal places as needed.) b. Find the probability that a randomly chosen person from this group said "Yes," given that the person does not have a child under 18 years old. (Type an integer or decimal rounded to four decimal places as needed.) c. Find the probability that a randomly chosen person from this group said "Yes" or had a child under 18 years old. (Type an integer or decimal rounded to four decimal places as needed.)
Suppose that 30 percent of an adult population have an infectious disease and 40 percent have achronic disease. Assume that having an infectious disease is independent from having a chronicdisease. For each of the questions below perform the calculation using appropriate statisticalnotation.a. What is the probability that a person selected at random will have both diseases?b. What is the probability of having the infectious disease for people with the chronic disease?c. What is the probability of having the infectious disease for people without the chronic disease?d. What is the probability of not having the infectious disease for people with the chronicdisease?
Based on a smartphone survey, assume that 51% of adults with smartphones use them in theaters. In a separate survey of 248 adults with smartphones, it is found that 110 use them in theaters. a. If the 51% 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. If the 51% rate is correct, the probability of getting 110 or fewer smartphone owners who use them in theaters is (Round to four decimal places as needed.) b. Is the result of 110 significantly low? v because the probability of this event is v than the probability cutoff that corresponds to a significant event, which is Question Viewer Enter your answer in the answer box. ? PAGES 1377 NOV W 14 MacBook Air DII 80 888 F10 F6 F7 F8 F3 F4 F5 %24 2 3 4 7 R T. Y く0 E.
In a sample of college students, 100 live on campus, 60 live with family off campus, and 40 live in an apartment off campus. A.What is the probability a randomly selected student lives off campus? B. Explain why this is an example of empirical probability.
use the following information to answer the question. Suppose that the probability that a person books a hotel using an online travel website is 0.68. For the questions that follow, consider a sample of 15 randomly selected people who recently booked a hotel. out of 15 randomly selected people, how many would you expect to use an online travel website to book their hotel, give or take how many? Round to the nearest whole person

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