III. Identification. Tell whether the statement is a simple random, sytematic, stratified or cluster sampling. _1. A researcher interviewed people from each town in the province of Albay for his researchon population._2. A researcher interviewed all top Grade 11 students in each of 15 randomly selectedprivate school s in Metro Manila._3. In a recent research that was conducted in a private school, the subjects of study wereselected by using the Table of Random Numbers.4. A researcher is doing a research work on the students' reaction to the newly implementedcurriculum in mathematics and interviewed every 10th student entering the gate of aschool.5. A researcher randomly selected 10 barangays in a town for her study. She did this bywriting names of each barangays on a piece of paper which then folded and put in a bowlthen she draw 10 pieces of paper from the bowl.

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Answered: _1. A researcher interviewed people…

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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Race organizers want to survey the participating runners on the quality of the running course. Which of the following uses systematic random sampling? Select the first 15 finishers and the last 15 finishers to take the survey. Randomly select 15% of the male participants and 15% of the female participants. Select the 5th finisher (with the number 5 being randomly chosen) to survey, then survey every 15th finisher after that. Sort all of the runners' names alphabetically, then randomly choose 2 letters and survey all participants whose last name begins with one of those letters.
. Choose at least two (2) non-probability sampling techniques and base on your understanding, explain them with your own words. Convenience Sampling Snowball Sampling
Q8. A couple is planning to have a family. They decide to stop having children either when they have two boys or when they have four children. Suppose that they are successful in their plan. Write down the sample space.
4. Suppose that 15% of all students at your school ride a bicycle to class each day. Suppose further that you take a random sample of 80 students at your school. a. Is 15% number a parameter or a statistic? Explain briefly. b. Are you guaranteed that 15% of your sample ride a bicycle to class each day? Explain briefly. c. Describe the sampling distribution of the sample proportion of these 80 students who ride a bicycle to class each day. (Hint: Be sure to refer to the shape, center, and spread of this sampling distribution.) Also include a well- labeled sketch of this distribution. HCL SYstem
4
. List the 10 possible samples (without replacement) of size 2 that can be obtained from the population of five officials. Lieutenant Governor (L) Secretary of State (S) Attorney General (A) Representative (R) Press Secretary (P) b. If a simple random sampling procedure is used to obtain a sample of two officials, what are the chances that it is the first sample on your list in part (a)? the secondsample? the tenth sample?
4a. Suppose that 35% of senior citizens have a social media account. If we survey 150 senior citizens, what is the mean of the sampling distribution? Group of answer choices 35.0% 52.5% 40.0% 70.0%
You are the operations manager for an airline and you are considering a higher fare level for passengers in aisle seats. How many randomly selected air passengers must you survey? Assume that you want to be 90% confident that the sample percentage is within 5.5 percentage points of the true population percentage. Complete parts (a) and (b) below. a. Assume that nothing is known about the percentage of passengers who prefer aisle seats. (Round up to the nearest integer.) b. Assume that a prior survey suggests that about 38% of air passengers prefer an aisle seat. (Round up to the nearest integer.)
Which of the following is an example of judgment sampling? A. The Texas House of Representatives has 85 Republicans and 65 Democrats. To estimate how the representatives will vote on a certain bill, 17 randomly choosen Republican members and 13 randomly choosen Demmocratic members are interviewed on their opinions. B. To gather the opinions on a certain fashion line, a magazine interviews other respected fashion designers. C. To inspect the quality of goods from a production line, every 50th item produced is tested. D. An airport wants to measure customer satisfaction. The researcher only approaches travelers who are waiting at a gate or browsing a airport shop.
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23. Education Level and Smoking At a large factory, the employees were surveyed and classified according to their level of education and whether they smoked. The data are shown in the table. Educational level Not high High school College graduate school Smoking habit graduate graduate 19 25 Smoke 6. 14 Do not smoke 18 7. If an employee is selected at random, find these prob- abilities. a. The employee smokes, given that he or she gradu- ated from college. b. Given that the employee did not graduate from high school, he or she is a smoker.
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