In a recent poll of 300 home-owners in Calgary, 240 said that they would not vote for a particular political candidate in the upcoming election. Assuming these home-owners are representative of all Calgary residents, then: a) In a random sample of 15 Calgary residents, what is the probability that more than 9 would not vote for this candidate in the next election?

In a recent poll of 300 home-owners in Calgary, 240 said that they would not vote for a particular political candidate in the upcoming election. Assuming these home-owners are representative of all Calgary residents, then: a) In a random sample of 15 Calgary residents, what is the probability that more than 9 would not vote for this candidate in the next election?

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...

See similar textbooks

Similar questions

1. A focus group of 4 members is to be randomly selected from a medical team consisting of 8 doctors and 6 technicians and 5 paramedics and 7 nurses. a. What is the probability that no doctors or no paramedics are selected? Let
1. The test contains four questions, and there are five different answers to each of them, of which only one is correct, the others are incorrect. What is the probability that a student who does not know the answer to any question will guess the right answer? (PERCENTAGE FORMAT) 2. At a certain university, 25% of students are in the business faculty. Of the students in the business faculty, 66% are males. However, only 52% of all students at the university are male. a. What is the probability that a student selected at random in the university is a male in the business faculty? b. What is the probability that a student selected at random in the university is male or is in the business faculty? c. What percentage of males are in the business faculty? (PERCENTAGE FORMAT)
Consider a political discussion group consisting of 4 Democrats, 9 Republicans, and 6 Independents. Suppose that two group members are randomly selected, in succession, to attend a political convention. Find the probability of selecting two Democrats.
10) According to the American Academy of Ophthalmology, there is a 45% chance that someone will have brown eyes. What is the probability that all of the next seven people selected will have brown eyes?
2. A political scientist developed a test designed to measure the degree of awareness of current events. She wants to estimate the average score that would be achieved on this test by all students in a certain high school. The administration at the school will not allow the experimenter to randomly select students out of classes in session, but it will allow her to interrupt a small number of classes for the purpose of giving the test to every member of the class. Thus, the experimenter selects 25 classes at random from the 108 classes in session at a particular hour. The test is given to each member of the sampled classes, with results as shown in the accompanying table. Number of students, mi Total score, yi Class 1 31 1590 2 29 1510 3 25 1490 4 35 1610 5 15 800 6 31 1720
A survey was done in regards to what type of animals are preferred as pets. Each respondent selected their top choice of animal for a pet. Respondents selected from: dog, cat, farret, fish, and bird. After the survey was completed, 41% picked dog, 34% picked cat, 4% picked farret, 8% picked fish, and 13% picked bird. Suppose three respondents were chosen at random. What is the probability that AT LEAST ONE of them picked dog? Round the answer to 3 decimal places.
A group of four workers is needed to participate in a workplace joint health and safety committee. The following volunteers are available: 3 from the human resources department, 2 from accounting and finance, 4 from marketing, and 3 from manufacturing. What is the probability of selecting no volunteers from accounting and finance?
In one district of the city, 50% of heads of families areowners, 75% own a car and 30% own and own a car. If we choose a leaderfamily at random, find the probability that this person:a) owns a car, if she is an owner.b) is not an owner, if she does not own a car.c) does not own a car, if she is not an owner.
3. The latest data from the CDC indicates that 14% of Americans are smokers. A researcher wants to identify smokers for a survey. He randomly selects people entering a grocery store to ask if they are a smoker. a) What is the probability that he identifies the first smoker on his 5th try? b) What is the probability that he has to approach more than 8 people before finding the first smoker? c) How many people does he expect to approach before finding the first smoker?
16. Ten percent of the students at a certain college are non-resident. A reporter for the student paper would like to interview at least 5 non-residents. If the reporter randomly selects 100 names from the student directory and begins contacting them, what is the probability that she will contact at least 5 non-resident students?