Sadara would like to know the course preference of Senior High Students in a certain school by usinga sample of Grade 11 and Grade 12 students. In her study, she utilized all honor students to rank allthe courses with 1st being the course they like the most and 10th being the course they dislike themost. Then, in the summary of the results of her study, she calculated the mean of the ranks in eachcourse to determine which courses are the top three most preferred and the three most dislikedcourses. The results showed that senior high students' three most liked courses are PersonalDevelopment, UCSP, and Chemistry/Marketing while the three most disliked courses are GeneralMathematics, Qualitative Research, and Philosophy. Sadara concluded from the results that maybestudents disliked Philosophy and General Mathematics due to the pureness and the difficulty of thecourses and liked Personal Development and UCSP due to the relevance of the courses. Thefollowing are the errors committed by Sadara in her study EXCEPT one. Which of the following isnot an error of the study?A. Choosing only the honor students in the study, which signifies a non-random samplingprocedure was used.B. Getting the mean of ranks to describe the top liked and disliked courses.C. Selecting only the top three liked or disliked courses from the list.D. Formulating conclusions or inferences on the reasons of the top three liked or dislikedcourses based on the ranks. Below are the research questions offour students and the statistical tests they used in ordertoanswerthe said questions. Who among themuseda statisticaltoolthatis NOT appropriate with theobjective(s) of his/her study?A. Elizabeth conducted a study to investigate the antimicrobialpotentials of a plant's leafethanolic extractagainst two multiple antibiotic resistant bacteria; namely Staphylococcusaureus and Escherichiacoliusing standard microbiologicaltechniques. The extracts weretestedusing agar diffusion method and the antimicrobial potency of the extracts wereevaluatedby the detemination of the zone ofinhibitions. Elizabethused Man-Whitney UTestto answerthe question, "is there a significant difference on the zone of inhibitions of S.aureus and E. coli when treatedwith the plant's leafethano lic extract?"B. Elijah conducted a research to detemine the existence of a relationship between the plasmaascorbic acidlevels and stress levels of pregnant women Twenty (20) womenin the lastthree months of pregnancy, free of majorhealth disorders, andranging in age from 15 to 32years, were selected forthe study. The plasma Ascorbic acid values were deteminedinmilligrams permilliliters through a 20 mL blood sample while the stress level scores weremeasuredusing the PSS or perceived stress scale. Elijahused Pearson'srto answerthequestion, “is there sufficientevidenceto conclude thatthere is a significant relationshipbetween pregnant women's stress level scores and plasma ascorbic acidvalues?"C. Bethanielis trying to decide whether the use ofradial tires instead ofregular belted tireswill improve the fuel economy ofthe mo dels in their compary. At 0.50 power and 0.80expected effectsize, thirteen (13)cars were equipped with radial tires and driven over aprescribedtest course. Without changing drivers, the same cars were then equipped withregular belted tires and driven once again overthe test course. The gasoline consumptionin kilometers per liter, was recorded. Betharielusedt-test forindependent samples toanswerthe question, “do cars equipped withradial tires give better fuel economy thamthose equipped with belted tires?"D. Elgardis trying to detemine whether the type ofleadership of a personis associated withhis educational background (programgraduated). Inthis study, a sample of 384management lea ders were selected. Elgard used Chi-square test to answer the question, “isthere a significant association between a person's type of leadership andprogramgraduated from?".

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Sadara would like to know the course preference of Senior High Students in a certain school by using a sample of Grade 11 and Grade 12 students. In her study, she utilized all honor students to rank all the courses with 1st being the course they like the most and 10th being the course they dislike the most. Then, in the summary of the results of her study, she calculated the mean of the ranks in each course to determine which courses are the top three most preferred and the three most disliked courses. The results showed that senior high students' three most liked courses are Personal Development, UCSP, and Chemistry/Marketing while the three most disliked courses are General Mathematics, Qualitative Research, and Philosophy. Sadara concluded from the results that maybe students disliked Philosophy and General Mathematics due to the pureness and the difficulty of the courses and liked Personal Development and UCSP due to the relevance ofthe courses. The following are the errors committed by Sadara in her study EXCEPT one. Which of the following is not an error of the study? A. Choosing only the honor students in the study, which signifies a non-random sampling procedure was used. B. Getting the mean of ranks to describe the top liked and disliked courses. C. Selecting only the top three liked or disliked courses from the list. D. Formulating conclusions or inferences on the reasons of the top three liked or disliked courses based on the ranks.

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...