Suppose I want to ask people their opinions on the recent Covid pandemic. I decide to put a survey up on social media to get responses from anyone who is willing to fill it out. What sampling method would this be?
Q: A researcher decided to gather data from all 150 employees in a certain office instead of just…
A: A certain office has 150 employees. All of them are selected by a researcher to gather data from.
Q: A newspaper posted this question on its website: "How often do you seek medical information…
A: Voluntary response sample:If the sample made up of volunteers or self-selected participants then the…
Q: If the level α remains the same, and the sample size increases, then the power will __________.…
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Q: Design a single sampling plan given p1=0.05, p2=0.15, producer's risk = 0.05, and consumers' risk =…
A:
Q: When a researcher who is studying "serious tennis players" asks 200 people if they qualify as this…
A: In the following problem Convenience Sampling is to be used
Q: What is the degree of freedom if the sample size is 25.
A: It is given that Sample size n = 25 Note : Since you have asked multiple questions, we will solve…
Q: Assume we do a simple random sample, where we have the same number of secondary units. Will cluster…
A: Since in the first case, the number of secondary units is the same, simple random sampling can be…
Q: As part of the SPC Reads initiative, Prof. Rosengarten needs to find out what the 10 most popular…
A: It is an example of Simple Random sampling
Q: You timed every kth dog grooming session over the course of a month, which resulted in 35 timed…
A: Hello! As you have posted 2 different questions, we are answering the first question. In case you…
Q: State one similarity and one difference between quota sampling and stratified random sampling.
A: Please find the explanation below.
Q: A researcher divided subjects into two groups according to gender and then selected 200 members from…
A: Since we know that In stratified sampling we divided homogeneous groups from the heterogeneous…
Q: The student council invites all students to provide ideas for activities. Which sampling method is…
A: Voluntary response sample: The voluntary response sample is the sample in which the respondents by…
Q: In a survey of 671 subjects, each was asked how often he or she watched TV. The survey subjects were…
A: Voluntary response sampling: In voluntary response sampling, the respondents select themselves into…
Q: is a sampling considered biased?
A: We know that The sampling method is called biased when it favors some outcomes over the others…
Q: When you throw a dice twice, what is the size of the sample space?
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Q: . When an accurate and complete list of the population is not available, a sampling will suffer…
A: We want to tell you, which one is the correct choice.
Q: Consider the results of a survey on whether a casino is to be built near a town. After reviewing the…
A: The given situation is a case of convenience sampling method. Because those who gamble agree…
Q: The Denver Area Big Organization for Medicine and Business (DA-BOMB) is a not-for-profit consultant…
A: Solution: Stratified random sampling: Stratified random sampling is a type of prbability sampling…
Q: provide an example using convenience sampling to design a study with 100 students
A: Convenience sampling is a method of non-probability sampling where the sample is taken from the…
Q: Determine the sampling method described in each of these studies.
A: Sampling is pivotal to statistics as good sample results into accurate inference about the…
Q: In a study, the sample is chosen by asking people on the street What is the sampling method? Simple…
A: In the given Question , The sample is chosen by asking any people on the street without any…
Q: Identify the sampling techniques used, and discuss potential sources of bias (if any). Explain.…
A: In simple random sampling, each of the unit is population has equal chance of being selected in the…
Q: If the subjects are homogeneous (uniform) and the subjects are in natural order in the population to…
A: The subjects are homogeneous and they are in natural order in the population to be researched. In…
Q: Identify which sampling method is applied for each situation.
A: Given :
Q: What percentage of Contra Costa County adults supports a ban on assault-style weapons? Suppose that…
A: Since, we answer only up-to three subparts, we'll be answering the first three subparts. Please re…
Q: A Senior Housemaster wishes to investigate whether some residents in his Hall are Homosexuals and…
A: Given A Senior Housemaster wishes to investigate whether some residents in his Hall are Homosexuals…
Q: The school nurse would like to conduct a study on the sleeping habit of grade six students in their…
A: the school nurse would like to conduct a study on the sleeping habit of grade six students in their…
Q: What type of sampling is used?
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Q: What is a sample in which the sampling units are chosen from the population according to a random…
A:
Q: Ideally, in cluster sampling, each cluster should ______ the entire population.
A: Cluster sampling: In cluster sampling the whole population is divided into different sections or…
Q: What does a sampling distribution serves?
A:
Q: cluster sample.
A: Cluster sampling is a probability sampling technique where researchers divide the population into…
Q: In your initial post, consider what you have read in the assigned Chapter 2 sections of the textbook…
A: Sampling Error - A sampling error is a statistical error that occurs when an analyst does not select…
Q: Explain the four different types of sampling and give an example of each.
A: Different types of sampling methods with examples.Types of random samplings(1) Simple random…
Q: If a population has a mean of 25.6, then the mean of the sampling distribution of the sample means…
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Q: Gallup World At its website (www.gallupworldpoll.com) the Gallup World Poll describes their…
A: Since you have asked multiple questions, we will solve the first question for you. If you want any…
Q: 3. If you are going to conduct a survey on the opinions of students regarding HB6875 or the proposed…
A: NOTE : As per Bartleby guidelines, only one question will be answered in case of multiple questions.…
Q: The collection of all possible sample points in an experiment is
A: An experiment is any activity that has an observable result. For example: Tossing a coin, rolling a…
Q: 1. Come up with a sampling plan to find the proportion of dots that are red, and also an estimate of…
A: Given: A square of side 1 with numerous red and black dots
Q: The BLS uses sampling for its National Compensation Survey to report employment costs. In its second…
A: Ans : STRATIFIED sampling (c)
Q: What is another kind of sampling error you might see in a poll besides random sampling error?
A: The total error of the survey estimate results from the two types of error. Sampling error. Non…
Q: For quality assurance, every fifth package on an assembly line is selected and tested for…
A: Given that for quality assurance, every fifth package on an assembly line is selected and tested for…
Q: In an AOL survey of Internet users, this question was posted online: "Have you ever been hit by a…
A: Given: The question posted online is: Have you ever been hit by a computer virus? Among the…
Q: Could an author use a non-random/non-probability sampling to describe a population of 50,000? why or…
A: Non random sampling is a sampling technique where the probability of an individual selected in a…
Q: Select at random, 200 University students from the list and send them a survey question online. what…
A: Option B is the answer. Answer : Simple Random Sampling Explanation : In the above example,200…
Q: Discuss the four different sampling methods, and for each method, explain why we might use it.
A: Here we need to discuss four different types of sampling methods with their uses.
Q: and
A: For conducting a research within Barangay stratified random sampling should be used. Because in…
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- A researcher wants to know whether people are more likely to contact their local government officials depending on whether people are Democrats, Republicans, or Independents. What method will the researcher use to evaluate this hypothesis?During the Covid crisis, there were lockdowns and working-from-home, which made collecting data on unemployment more challenging. Researchers from a US University conducted a survey of 1,000 individuals in the labour force to assess rise in unemployment in September 2020. The object was to find out whether the unemployment rate had risen above a benchmark proportion of 5 per cent of the labour force in Scotland. Of the surveyed persons, 60 reported being unemployed in the week prior to the survey. Conduct a two-tailed test of whether unemployment rate during this period was 5 per cent. Set out your null and alternative hypotheses, significance level, test statistic, assumptions and sampling distribution clearly. Conduct the test and comment on the economic significance of the findings.Based upon a survey of 17000 California residents; Gallup Poll notes that, if the election were held today, over half of all voters would vote to recall Gov. Davis. This is an example of
- A cohort study was conducted over five years among 200 trial attorneys and general practice attorneys after stringent tort law reform, to see how many would develop heart conditions over time. In total, 50 attorneys developed heart disease. It was found that 40 who developed disease practiced trial law, while 10 who developed disease did not practice trial law. One hundred (100) who did not develop disease also did not practice trial law, and 50 who did not develop disease practiced trial law. Set up the 2 x 2 table and calculate the appropriate rate of riskKentville, a community of 10,000 people, resides next to a krypton mine, and there is a concern that the emission from the krypton smelter have resulted in adverse effects. Specifically, Kryptonosis seems to have killed 12 of Kentville’s inhabitants last year. A neighboring community, Lanesburg, has 25,000 inhabitants and is far enough from the smelter to not be affected by the emission. In Lanesburg, only three people last year died of Kryptonosis. Given that the number of deaths in Kentville and their causes last year were: Heart attack=7 Accidents=4 Kryptonosis=12 Other=6 What is the risk of dying of Kryptonosis in Kentville relative to non-contaminated locality?What is the risk of dying of Kryptonosis in Kentville relative to deaths due to other causes? How many times the chance of dying of Kryptonosis compared to dying of accidents ? How many times the chance of dying of Kryptonosis compared to Other causes?Globally, 35% of all ridged brittleshell tortoises have spots on their shells. A herpetologist in Citition collects a sample of 38 ridged brittlesell tortoises and finds that 16 of them have spots on their shells. The herpetologist would like to test the claim that the proportion of ridged brittleshell tortoises in Cititon with spots on their shells is greater than 35%. The herpetologist ends up rejecting the null hypothesis. If the actual proportion of ridged brittleshell tortoises in Cititon with spots on their shells is 41%, then what type of error, if any, has occurred? In the problem above, what is the test statistic?
- Should GNMH alert other patients and/or the public about the mysterious infections? Why or why not? What information and with whom should they communicate now?During the Covid crisis, there were lockdowns and working-from-home, whichmade collecting data on unemployment more challenging. Researchers fromHeriot Watt University conducted a survey of 1,000 individuals in the labour forceto assess rise in unemployment in September 2020. The object was to find outwhether the unemployment rate had risen above a benchmark proportion of 5per cent of the labour force in Scotland. Of the surveyed persons, 60 reportedbeing unemployed in the week prior to the survey.(i) Conduct a two-tailed test of whether unemployment rate during this periodwas 5 per cent. Set out your null and alternative hypotheses, significancelevel, test statistic, assumptions and sampling distribution clearly. Conductthe test and comment on the economic significance of the findings. (ii) Now conduct a one-tailed test of whether unemployment rate during thisperiod exceeded 5 per cent. Set out your null and alternative hypotheses,significance level, test statistic, assumptions and…Mechanical engineer Kwok Wai Tham of the National University of Singapore set out to sample how much virus COVID-19 patients produce when they breathe, talk or sing, in part, to address skeptics’ concerns. “I’m doing this to convince some very close friends,” he says. He and colleagues rolled a mobile lab into 22 patients’ rooms and had volunteers stick their heads into a large metal cone. The researchers collected both aerosols and larger droplets that the patients exhaled while breathing quietly for 30 minutes, while repeating passages from Dr. Seuss’ Green Eggs and Ham for 15 minutes, or while singing simple tunes like the “Happy Birthday” song, “Twinkle, Twinkle Little Star” or the “ABCs” for 15 minutes. The scientists tested both aerosols and large droplets in the air samples for coronavirus RNA and calculated how many copies of the virus’s nucleocapsid protein gene, or N gene, were present. That gives an estimate of how much virus is in a sample.Of the 22 patients who sang for…
- It describes a scenario in which a math teacher named Matt allows his students to use a 1-page reference sheet during exams, and compares the effectiveness of this method to a colleague's method of providing a pre-made reference sheet for students.In many colleges, educators are changing their approach to instruction from a “teacher/lecture-centeredmodel” to a “student-centered model” where students learn in a laboratory environment in which lectureis deemphasized and students can proceed at a pace suitable to their learning needs. In once schoolwhere this model was being introduced, of the 743 students who enrolled in the traditional lecture model, 364 passed; of the 567 in the student-centered model, 335 passed. Use a 0.05 level ofsignificance to test the claim that student-centered model results in a higher pass rate than the traditionalmodel?The University is considering changing the email system that they currently use. Since there are substantial learning costs associated with any new software, the University only wants to change to the new system if it is very confident that there is at least a 20% difference in the proportion of faculty and staff who say they like the new system. In a sample of 120 users of the current system, the University finds that 65 say they like the current system. In another sample of 90 experimental users of the “new” system, the University finds that 70 of them like the new system. When testing the hypothesis (using a 5% level of significance) that there is at least a 20% difference in the proportion of users who like the two systems, the p-value is .2943; what is your conclusion concerning the null hypothesis? Reject the null hypothesis Fail to reject the null hypothesis