4. Which sampling method was utilized? Why?(a) Student organization looking to get signatures for a petition camp out in front of Class of 128Computer room(b) Select three students from a class to receive ice cream by putting all the students' names in a hat andpicking out three names randomly.(c) Select three female students and three male students to receive ice cream by putting all the men'snames in one hat and all the women's names in a different hat and picking out three names from each1hat.(d) In Summer 2018, the ABC in Australia requested viewers to call the network and indicate theirfavorite poem.(e) Divide the class into four groups (freshman, sophomore, junior and senior) and take a randomsample of two students from each group.(f) Priceline.com randomly e-mails a Customer Satisfaction Survey for certain transactions done on itssite in which customers choose to either respond or not.5. A medical researcher wants to determine whether exercising can lower blood pressure. At a healthfair, he measures the blood pressure of 100 individuals, and interviews them about their exercisehabits. He divides the individuals into two categories: those whose typical level of exercise is low,and those whose level of exercise is high.a. Is this a controlled experiment or an observational study?b. The subjects in the low exercise group had considerably higher blood pressure, on theaverage, than subjects in the high exercise group. The researcher concludes that exercisedecreases blood pressure. Is this conclusion well-justified? Explain.

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Answered: 4. Which sampling method was utilized?…

Advanced Engineering Mathematics

10th Edition

ISBN:9780470458365

Author:Erwin Kreyszig

Publisher:Erwin Kreyszig

Chapter2: Second-order Linear Odes

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1) what is the sampling method in this senario? A study on the economic status of all the account holders in a certain bank will be conducted. This bank has 50,000 account holders and an alphabetical list of these account holders is available. Two hundred random numbers from a calculator will be generated. These random numbers will be used in getting the 200 respondents from the alphabetical list. a. Simple Random b. Cluster c. convenience d.Stratified e. Quota
A company is selecting 6 people to be on a committee. There are 26 employees eligible to be on the committee. What is the total number of ways the committee may be formed if the employees are selected at random and each employee will have a different position on the committee? (One person will be president, another vice president, ...)
A community college has 7654 students currently enrolled in classes. To gain the students' opinions about an upcoming building project, the college president wishes to obtain a simple random sample of 8 students. He numbers the students from 1 to 7654. Complete parts (a) and (b) below. (a) Using the provided random number table, the president closes his eyes and drops his ink pen on the table. It points to the digit in row 2, column 4. Using this position as the starting point and proceeding downward, determine the numbers for the 8 students who will be included in the sample. The numbers for the students are _____________. (b) The president uses technology to produce the following random numbers. 6647, 7546, 5135, 795, 1216, 7546, 2732, 5137, 7350, 5135 Determine the numbers for 8 students who will be included in the sample. The numbers for the students are ______________.
4. The English teacher at your school wants to randomly select students to present a scene from a Shakespeare play in class. There are four roles to fill, two for males and two for females. Describe a process that would use random numbers to select the people to contact. There are 9 males and 11 girls in this class.
1)The population of a city is made up of 2223 men and 7777 women. For an opinion survey, a STRATIFIED SAMPLING of such population was carried out, with 80 people. How many men and women, respectively, should compose the sample? justify
The principal at Tahoe Elementary School randomly selected three of the school's twelve classes of students to participate in an option poll. All of the children in each of the three randomly selected classes were asked the question, "What is your favorite fruit to eat?". The following results were obtained. Apples, Grapes, Apple, Apple, Banana, Apple, Apple, Grapes, Orange, Apple, Apple, Banana, Strawberries, Apple, Apple, Grapes, Apple, Orange, Apple, Apple, Apple, Apple, Grapes, Grapes, Apple, Orange, Apple, Apple, Banana, Apple, Apple, Apple, Strawberries, Apple, Orange, Grapes, Grapes, Apple, Grapes, Grapes, Grapes, Banana, Grapes, Banana, Apple, Banana, Grapes, Apple, Banana, Strawberries, Banana, Apple, Orange, Grapes, Orange, Grapes, Apple, Orange. Use the results of this opinion poll to estimate, with 95% confidence, the actual percentage of children attending Tahoe Elementary School whose favorite fruit to eat is Grapes. Express the estimate both symbolically and verbally.
Find the answer to each of the following counting problems: • The U.S. Senate Appropriations Committee has 29 members and a subcommittee is to be formed by randomly selecting 5 of its members. How many different committees could be formed? • If 25 people start a race, in how many different ways can the top 2 finishers be determined? • Companies who stocks are listed on the NASDAQ stock exchange have their company name represented by either four or five letters (repetition of letters is allowed). What is the maximum number of companies that can be listed on the NASDAQ?
A lecturer wishes to study the examination results of students from the Faculty of Computer Science which consists of 30 classes. He intends to choose only eight classes and all the students from these eight classes will be selected (a) State the population for this study. (b) State the variable and its type for this study. (c) State the sampling technique used for this sta
Five state officials are listed to the right. Lieutenant Governor (L) Secretary of State (S) Attorney General (A) Representative (R) Press Secretary (P) a. List the 10 possible samples (without replacement) of size 3 that can be obtained from the population of five officials. b. If a simple random sampling procedure is used to obtain a sample of three officials, what are the chances that it is the first sample on your list in part (a)? the second sample? the tenth sample? a. List all 10 possible samples (without replacement) of size 3. Use the letter abbreviation for each official. (Use a comma to separate answers as needed.) b. What is the chance that the first sample in your list is selected? Type an exact answer.) What is the chance that the second sample in your list is selected? Type an exact answer.) What is the chance that the tenth sample in your list is selected? (1)
A company is selecting 6 people to be on a committee. There are 26 employees eligible to be on the committee. What is the total number of ways the committee may be formed if the employees are selected at random?
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
The government of a large city needs to determine whether the city's residents will support the repair of several roads. The government decides to conduct a survey of a sample of the city's residents. Which one of the following procedures would be the most appropriate for obtaining a sample of the city's residents? O Survey a random sample of the residents who use public transportation. O Survey every tenth person to use the public restroom. O Survey the last 100 residents listed in the telephone directory. O Survey a random sample of persons within each neighborhood. C

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