For each sample, indicate what strategy was involved and what (if any) biases might result.a) Run a poll on the local TV news, asking people to dial one of two numbers to indicate whether they favor or opposea proposed plan.4.b) Hold a PTA meeting at each of the 20 elementary schools and tally the opinions expressed by those who attend themeetings.SRS undercoverage biasc) Randomly select one class at each elementary school and contact every parent for that class.SreAffied sahpled) Go through a district's enrollment records, selecting every 40h parent. PTA volunteers will go to the homes tointerview the people chosen.SRS

Answered: Image /qna-images/answer/64d2b560-48bb-4efb-a8d9-e4deb2ca09d1.jpg

Answered: For each sample, indicate what strategy…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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b) A researcher has conducted a study to measure the performance of students in Diploma in Accounting from XM College with 100 of them being selected as a sample. The researcher wants to investigate whether there is a relationship based on cumulative grade point average (CGPA) and the average number of hours of study per week. i) Determine the population and sample for this study. ii) State the sampling frame for this study. iii) Identify the appropriate sampling technique for this study and give ONE (1) reason of the chosen technique. iv) Determine the best data collection method and give ONE (1) advantage of the chosen method.
A psychology student wants to know the level of satisfaction of the residents on the mental health awareness initiatives of their Rural Health Unit. He/She decided to just consider a sample to save time, money and effort. Table 1 shows the distribution of residents in each barangay of the local government unit (LGU). Table 1 Distribution of SK Members in the Municipality of Maharlika Barangay Matapat Marangal Mapagkakatiwalaan Masinop Matiyaga Matalino Mapagbigay 243 369 189 298 312 347 172 c. Determine the sample size needed from each barangay. Construct Table 2 considering the Slovin's formula and Table 3 for the Lynch, et. al. formula
An automotive service center would like feedback on its customer service. Each customer receives a printed card after they pay for services with a short survey on which customer service is ranked on a scale from 1 (least satisfied) to 5 (most satisfied). Customers can then choose to submit the card in a box on their way out of the store. The store manager finds that 140 cards were filled out in the past week, with an average customer satisfaction score of 2.47. Which type of bias is most likely to be present in the survey results? O This is undercoverage bias because some types of customers may not have received cards. O This is nonresponse bias because many customers may choose to not fill out the cards. O This is question wording bias because the customer service score levels may not be clear to customers. O This is response bias because customers may not be truthful about their experience with customer service. Mark this and return Save and Exit Next Submit 近
All students who physically attended the graduation orientation were asked to write their mobile number on a piece of paper provided by the event organizer. These papers were placed in a bowl and the host picked ten (10) entries who will receive a GCash amounting to P1,000. a. Simple Random Sampling b. Systematic Sampling c. Stratified Sampling d. Cluster Sampling
1 The Blue Tide High School Student Committee has 5 members. They would like to conduct a survey to get the students’ opinion on the school’s new bell schedule. They asked 23 students’ representatives to distribute a questionnaire to the schools’ 1550 students. In the end, they received 750 responses. They wrote a report based on the information provided by the respondents. 2) which number represents the size of the sample?
A sample of 239 adults is selected. The adults are classified according to voter registration status ("registered" or "not registered"). They are also classified according to preferred source of current events information ("television", "newspapers", "radio", or "internet sites"). The results are given in the contingency table below. Television Newspapers Radio Internet sites Registered 46 16 29 36 Not registered 31 20 32 29 What is the relative frequency of adults in the sample who prefer to obtain their information through newspapers? Round your answer to two decimal places.
determine whether there is a potential for bias and explain why? A poster for the U.S.Deparment of Labor surveys 1500 randomly selected adults about their employment status.
For each situation, name the type of bias that may occur in the data collected. Explain your answer. a) A school wants to gather parent opinions on the current cell phone policy at the school. They have sent letters with a survey for the parent to return to the school board office. b) A survey about teaching strategies used in the “Secondary Classes” (7-12th grades) for a school district was handed out to a random sample of teachers from the three high schools in the district.Less than 20% of the surveys were returned. c) A survey with the question “Do you agree that a national system of health insurance should be favored because it would provide health insurance for everyone and reduce administrative costs?”
Sociologists argued that women on average earn less than men as women often choose to work less hours. They further suggest that the choice of hours worked may be driven by various factors such as age, childcare needs, occupation choice and flexibility. To investigate the relation between hours worked and income earned by Australian men and women, a researcher plans to survey a sample of individuals across the country. Briefly explain a) What type of survey method the researcher could use and why? b) What sampling method could the researcher use to select his/her sample and why? c) What are the two main variables the researcher should consider collecting data for the purpose of the above analysis and why? Identify the data type(s) for the variables. d) What kind of issues the researcher may face in this data collection? Suppose a researcher has collected data from a sample of 65 individuals using the sampling method you have proposed in (b). For each individual, the hours worked per…
A new restaurant has been open for three months and wants feedback from its customers. They plan to give a survey to every 5th customer. Census or Sampling method: Answer Collection method: Answer A dog food claims to make dogs coats shiner and healthier looking. A researcher wants to test the claims. They plan to randomly select pet store shoppers to participate and assign them to two groups. Census or Sampling method: Answer Collection method: Answer The Department of Homeland Security wants to test a computer virus that it has developed to combat hackers. They plan to test run the virus on randomly selected computers with pre-set "hacker" programs. Census or Sampling method: Answer Collection method: Answer
A study was done to determine whether morning exerciseimproved grades among all students at a community college. The softball coach in charge of the study handed out a survey to hergirls’softballteam in order to gather the data. Each student was asked to record two things:(1) how much exercise they did in the morning before class, and (2) their current grade point average. a.Identify the sampling method. b.Identify what bias is present in the survey. c.Determine whether the study is an experiment or an observational study d.Identify a major problem with the study.

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