In a recent survey of a fair stratified random sample of the population, a question appeared as: Do you plan to vote in favour of the speed limit change? Age 20-24 Age 25-29 Age 30-34 Yes 45 80 5 No 25 25 15 No response 25 10 55 If three people are picked at random from the sample, what is the probability that at least one did not respond to this question? If we assume there is no bias, what conclusions can be drawn

In a recent survey of a fair stratified random sample of the population, a question appeared as: Do you plan to vote in favour of the speed limit change? Age 20-24 Age 25-29 Age 30-34 Yes 45 80 5 No 25 25 15 No response 25 10 55 If three people are picked at random from the sample, what is the probability that at least one did not respond to this question? If we assume there is no bias, what conclusions can be drawn

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

	Age 20-24	Age 25-29	Age 30-34
Yes	45	80	5
No	25	25	15
No response	25	10	55

Similar questions

Crime incidents by quarantine violators. On June 10, 2020, CNN Philippines reported that the Philippine National Police (PNP) said that incidents of crime had decreased sharply during the country’s community quarantine, which lasted for 84 days. Concurrently, the Joint Task Force COVID Shield reported that a total of 193,779 quarantine violators had been warned, fined, or arrested. About 65.05% of them were from Luzon. Consider a random sample of 500 quarantine violators. a. Compute m and s for the random variable x, the num- ber of quarantine violators who are from Luzon. b. From the sample of 500 quarantine violators, is it likely that less than half are not from Luzon? Explain.
Suppose the manager agrees to pay each employee a$50bonus if they meet a certain goal. On a typical Saturday, the oil-change facility will perform 35 oil changes between 10 A.M. and 12 P.M. Treating this as a random sample, at what mean oil-change fime would there be a10%chance of being at or below? This will be the goal established by the manager. There would be a10%chance of being at or below minutes.
1) A 2010 survey asked 827 randomly sampled registered voters in California "Do you support? Or do you oppose? Drilling for oil and natural gas off the coast of California? Or do you not know enough to say?" Below is the distribution of responses, separated based on whether or not the respondent graduated from college. College Grad Yes No Support Oppose Do not know 154 132 180 126 104 131 Total 438 389 Conduct a hypothesis test to determine if the data provide strong evidence that the proportion of college graduates who do not have an opinion of this issue is different than that of non-college graduates. a) Write the hypotheses for this test. Ho : Pgrad – Pnongrad = НА: Рgrad - Рпоngrad b) What is the p-value? (Round to four decimal places, if necessary. If '
Which of the following are sources of sampling error and which are sources of nonsampling error? The subject cannot be contacted in five calls. The telephone directory is used as a sampling frame. Data are gathered by asking people to go to a website and answer questions online. A typing error is made in recording the data. The subject lies about past illegal drug use. Interviewers choose people on the street to interview.
study the effectiveness of a recent advertising campaign for a new menu item, a restaurant asks every fifth customer about their awareness of the new item. What type of sample is this? A. A judgment sample. B. A cluster sample. C. A convenience sample. D. A simple random sample. E. A systematic sample.
A political scientist claims that 38% of first-year college students characterize themselves as being “moderate” or “middle of the road” as far as their political affiliation is concerned. Believing this claimed value is too high, you survey a random sample of 400 first-year college students and find that 120 characterize themselves as being “moderate” or “middle of the road.” Based on this information, what will the test statistic be? Choose the answer below that is closest to what you calculate, and try not to do a lot of rounding until you get to the very end of your calculations. 1. -0.3 2. -1.2 3. -2.6 4. -3.3 5. None of the other answer options are correct because the test statistic should be positive, not negative.
Could an author use a non-random/non-probability sampling to describe a population of 50,000? why or why not?
It is common to think that the more education anindividual receives, the higher the person's income is likely to be. Does this idea translate to states? The following data represent the percentage of the population that has at least a bachelor s degree and the per capita personal income for a random sample of states. Test the claim that states with a higher percentage of the population with at least a bachelor's degree have a higher per capita personal income at the 0.05 level of significance. Data Percentage of Population with atLeast a Bachelor's Degree Per Capita Personal Income (Dollars) State Arkansas 17.4 24,289 California 29.8 33,749 Iowa 24.6 29,043 Louisiana 22.3 26,100 Maine 23.7 28.831 Nebraska 26.8 30,758 Ohio 25.0 29,944 Oregon 26.4 29.340 Texas 24.7 29,372 Source: Statistical Abstract of the United States, 2004
A. You want to study gender gaps in pay in Fortune 500 companies. a. What would be your sampling frame? b. How many companies would you study? What would be the probability that a company would be included in your study? You want to be sure that you include at least 30 retail companies and 30 information companies in order to test whether the gender gap in pay differs between them: how could you do this and still retain a probability sample? d. If your sample included only 30 retail and 30 information companies selected in the way you specified in (c): i. ii. C. Could you generalize to all Fortune 500 companies? Briefly explain. Could you generalize to all retail and information companies on the Fortune 500 list? Briefly explain.