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A researcher wants to determine whether a new teaching strategy improves students' test scores by comparing groups receiving different teaching methods. Which research is most appropriate?
A. Descriptive
B. Correlational
C. Experimental
D. Narrative
C. Experimental
A researcher examines whether the number of hours spent studying is associated with students' examination scores. What kind of quantitative research should be used?
A. Descriptive
B. Correlational
C. Experimental
D. Ethnographic
B. Correlational
A. Descriptive research
B. Experimental research
C. Historical research
D. Phenomenological research
A. Descriptive research
In the study "Effect of Study Time on Mathematics Test Scores," what is the independent variable?
A. Mathematics test scores
B. Study time
C. Grade level
D. Student name
B. Study time
In a study examining whether teaching method affects science achievement, what is the dependent variable?
A. Teaching method
B. Science achievement
C. Type of classroom
D. Number of teachers
B. Science achievement
Consider the research question: "Is there a relationship between social media use and academic performance?" Which correctly identifies the variables?
A. IV: academic performance; DV: social media use
B. IV: social media use; DV: academic performance
C. IV: students; DV: social media
D. IV: school; DV: students
B. IV: social media use; DV: academic performance
A researcher studies whether exercise frequency is related to stress level. Which pair correctly represents the variables?
A. Exercise frequency and stress level
B. Age and school name
C. Researcher and respondents
D. Questionnaire and statistics
A. Exercise frequency and stress level
In a study entitled "Effect of Fertilizer Amount on Plant Height," why is fertilizer amount considered the independent variable?
A. It represents the measured outcome.
B. It is the factor manipulated or varied.
C. It remains unchanged throughout the study.
D. It is affected by plant height.
B. It is the factor manipulated or varied.
A researcher claims, "Quantitative research is always better than qualitative research because numbers are completely objective." Which is the best evaluation of this statement?
A. Correct, because numbers cannot be biased
B. Correct, because qualitative research is unreliable
C. Incorrect, because the appropriate method depends on the research problem
D. Incorrect, because quantitative research does not use evidence
C. Incorrect, because the appropriate method depends on the research problem
A researcher assigns participants randomly to two groups and gives only one group a new learning application. What feature distinguishes this study from a correlational study?
A. It collects numerical information.
B. It manipulates an independent variable.
C. It uses students as respondents.
D. It calculates average scores.
B. It manipulates an independent variable.
A researcher finds that students who drink more coffee tend to study longer. However, examination schedules may influence both coffee consumption and study time. What role could examination schedules play?
A. Dependent variable
B. Confounding variable
C. Independent variable
D. Outcome variable
B. Confounding variable
A school wants to evaluate a tutoring program, but school policy prevents researchers from randomly assigning students to groups. Researchers instead compare an existing tutoring group with a similar non-tutoring group. Which design is most defensible?
A. Descriptive design because the researchers are comparing existing students.
B. Historical design because students' previous grades may be examined.
C. Quasi-experimental design because treatment assignment is not fully random.
D. Phenomenological design because students may describe their tutoring experiences.
C. Quasi-experimental design because treatment assignment is not fully random.
A school has a list of 800 Grade 12 learners. After randomly selecting a starting point, the researcher chooses every 20th name until the required sample is reached. Which procedure is being used?
A. Cluster sampling because participants are selected from a school list.
B. Systematic sampling because participants are chosen at a fixed interval.
C. Purposive sampling because the researcher decides which students qualify.
D. Convenience sampling because the participants are easily identified.
B. Systematic sampling because participants are chosen at a fixed interval.
A school has 100 STEM learners, 200 HUMSS learners, and 300 TVL learners. A researcher wants the sample to reflect these proportions. Which sampling procedure is most appropriate?
A. Cluster sampling because each strand can be treated as one group.
B. Convenience sampling because learners from each strand are accessible.
C. Stratified sampling because each subgroup is represented proportionally.
D. Snowball sampling because students can recommend classmates from their strand.
C. Stratified sampling because each subgroup is represented proportionally.
A researcher randomly selects five Grade 12 sections from a school and surveys every learner in those selected sections. Which procedure best describes the sampling process?
A. Purposive sampling because the researcher chooses complete sections.
B. Systematic sampling because the sections appear on a school list.
C. Cluster sampling because intact groups are randomly selected.
D. Stratified sampling because all selected learners belong to Grade 12.
C. Cluster sampling because intact groups are randomly selected.
A research group wants to study whether students' study habits are related to academic performance. Which operational plan is most appropriate?
A. Ask students to describe their study experiences without defining measurable indicators.
B. Identify measurable indicators for study habits and academic performance before collecting data.
C. Allow each respondent to decide what the term “good study habits” means.
D. Use only students' personal opinions because study habits cannot be measured numerically.
B. Identify measurable indicators for study habits and academic performance before collecting data.
A school develops a new reading program. Researchers randomly divide qualified students into two groups: one uses the new program while the other uses the existing program. After eight weeks, both groups take the same reading test. Which design best fits the study?
A. Descriptive design because the researchers will summarize test scores.
B. Correlational design because the researchers will measure reading performance.
C. Historical design because previous reading performance may be reviewed.
D. Experimental design because the researchers deliberately introduce a treatment.
D. Experimental design because the researchers deliberately introduce a treatment.
A principal asks researchers to determine the most common study habits among 600 Grade 12 learners. No treatment or intervention will be introduced. Which design best matches the purpose?
A. Experimental design because many students will participate.
B. Historical design because students' previous habits may be considered.
C. Descriptive design because existing characteristics will be summarized.
D. Correlational design because every learner has measurable study habits.
C. Descriptive design because existing characteristics will be summarized.
A research group finds that students who exercise more frequently tend to report lower stress levels. The researchers did not assign students to exercise programs. What conclusion is most appropriate?
A. The data show an association between exercise and reported stress.
B. The data prove that exercise directly causes students to feel less stressed.
C. The data show that stress directly determines how often students exercise.
D. The data establish that exercise should be prescribed to all students.
A. The data show an association between exercise and reported stress.
A researcher uses existing attendance records and final grades from the previous school year to determine whether the two variables are related. Why is this more consistent with correlational research than experimental research?
A. The researcher studies only one school year instead of several years.
B. The researcher uses numerical data instead of students' personal narratives.
C. The researcher measures existing variables without deliberately assigning a treatment.
D. The researcher calculates averages instead of asking participants open-ended questions.
C. The researcher measures existing variables without deliberately assigning a treatment.
A researcher discovers a statistically significant relationship between daily screen time and hours of sleep among Grade 12 learners. A colleague says, “This proves that screen time causes students to sleep less.” How should the researcher respond?
A. The statement is correct because significant correlations establish causation.
B. The statement is correct because sleep duration cannot influence screen use.
C. The statement is correct whenever the correlation coefficient is statistically significant.
D. The relationship shows an association, but additional evidence is needed to establish causation.
D. The relationship shows an association, but additional evidence is needed to establish causation.
A research team compares the average examination scores of students who attended a review program with those who did not. The statistical test indicates a significant difference between the two group means. Which conclusion is most appropriate?
A. Every student who attended the program necessarily improved.
B. The review program is proven to be the only cause of the difference.
C. The observed difference provides statistical evidence that the group means differ.
D. The two groups must have had identical scores before the review program.
C. The observed difference provides statistical evidence that the group means differ.
A researcher examines the relationship between attendance and academic grades and obtains r = 0.08. What is the most appropriate interpretation?
A. Attendance and grades have a strong positive linear relationship.
B. Attendance and grades have a very weak positive linear relationship.
C. Attendance and grades have a strong negative linear relationship.
D. Attendance and grades have a moderate negative linear relationship.
B. Attendance and grades have a very weak positive linear relationship.
A research study examines the relationship between the number of hours students spend studying each week and their reported academic stress. The researchers obtain a correlation coefficient of r = -0.78. Which interpretation is most appropriate?
A. Study hours and academic stress have a weak positive relationship.
B. Study hours and academic stress have a moderate positive relationship.
C. Study hours and academic stress have a strong negative relationship.
D. Study hours and academic stress have no meaningful relationship.
C. Study hours and academic stress have a strong negative relationship.
A researcher wants to determine whether weekly study hours are linearly related to students' examination scores. Which statistical technique is most appropriate?
A. Pearson correlation can quantify the strength and direction of the linear relationship.
B. Frequency distribution can determine whether one variable causes the other.
C. Percentage can measure the direction and strength of a numerical relationship.
D. Mode can determine whether two continuous variables move together.
A. Pearson correlation can quantify the strength and direction of the linear relationship.