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Homework answers / question archive / Statistics and practical research EARTH AND LIFE SCIENCE: PROBLEM SET 2 Practical Research 2: Problem Set 2 Estimated time to finish the problem set: 180 minutes (3 hours) Instructions: Follow all instructions in each section of the problem set carefully
Statistics and practical research EARTH AND LIFE SCIENCE: PROBLEM SET 2
Practical Research 2: Problem Set 2
Estimated time to finish the problem set: 180 minutes (3 hours)
Instructions: Follow all instructions in each section of the problem set carefully. Submit your
answers in [a] sheet/s of paper with the needed information following the format below:
You must accomplish this individually but you may collaborate with your classmates to discuss your answers. Do not hesitate to ask your teacher for help on questions that you cannot understand. Students who will be caught cheating will receive zero points for this problem set.
I. [5 pts.] Construction of an instrument: Tell whether the situations below are examples of adopting, modifying, or creating a research instruments. If it is adopting, write A; if modifying, write M; if creating, write C.
1. Jannrei is conducting a research about the effects of online gaming to a student's learning. He found a research paper that is similar to what he wants to do, so he just tweaked the research instrument presented in the paper to suit the collection and analysis of data.
2. Nina is embarking on a new research endeavor where research instruments are not yet developed. She must then try to produce a new research instrument to collect the data that she needs.
3. John Bert used an existing program to analyze the data that he collected.
4. Blessie changed a part of a machine to increase its accuracy in collecting the data that she needs.
5. Marissa borrowed a microscope from a laboratory to examine the reaction of a certain bacteria to different chemicals.
ll. [10 pts.] “Anong kailangan kong gawin upang malaman mo” Using different data collection techniques: Choose the best data collection technique in each of the situations below.
a. Questionnaire d. Focus group discussion
b. Survey e. Observational method
c. Interview f. Physiological devices
1. The Commission on Human Rights wants to conduct a research about the collective experience of victims of the drug war. To know the common experiences and differences, they want to conduct a discussion amongst the victims.
2. The Social Weather Station (SWS) wants to know the perception of the people on inflation, on whether they agree that inflation is an urgent issue or not.
3. A teacher is conducting research about the behavior of autistic children when they are immersed in the current teaching methods used for relatively normal children, hoping that this research will improve the delivery of education for children with special needs.
4. A social worker wants to know whether the amount of subsidy provided by the 4Ps program is enough to cover the monthly expenses of its beneficiaries. They want to do this ina massive scale where it is impractical to personally talk to each respondent to collect data.
5. Nurse Ana will take the height and weight of CSHS students to have a sweeping view of their health condition.
6. MC is tasked to conduct a research about the stress level that is experienced by teachers in CSHS. He thinks that it is better to talk to each teacher individually to adjust the questions according each teacher’s experiences.
7. John Bert wants to know whether students are satisfied with the current condition of school facilities (classrooms, library, restrooms, gym, etc.).
8. Cynthia wants to Know the number of students in CSHS that are experiencing hypertension.
9. Ms. Manalo, the SSG adviser, wants to know if the candidates who are running for the positions in the student government are qualified. She wants to have a conversation with them and ask questions about their plans if elected.
10. Matthew wants to observe the different behaviors of students during a class.
1. Method too use if we want to establish cause and effect.
2. Question which only has two possible answers.
3. A scale devised as an attempt to quantify views, opinions, and emotions.
4. Graph best used to provide a visual comparison of data.
5. Method used when a researcher is measuring behaviors of subjects in a given situation.
6. Question which provides more than two possible answers.
7. The procedures used in each sample should be the same for all samples to obtain comparable data.
8. Question in which the respondent is asked to rate the given statement using a corresponding response scale.
9. Sensitive information that may be used to trace an individual such as name, birthdate, and
ID numbers.
10. Logical and clear strategy that the researcher must use in order to integrate all elements of a study.
11. Method used to collect opinions or views of respondents on a certain issue.
12. Question which has no choices, where the respondent is free to write a response to the given statement.
13. A visual presentation that uses symbols or icons to represent numerical data.
14. The most common or most repeated value in a given data set.
15. Graph best used to show percentages of a whole.
16. Data presentation where values are listed in a set of rows and columns.
17. Method of data collection when a researcher has no direct access or direct measurement of the data and just relies on a trusted and valid source.
18. A document which contains a set of questions used to collect data.
19. Part of a research paper that details the procedures done to collect, process, and analyze data.
20. Measure of the central tendency of data where all the elements are added divided by the total population.
21. A plan on how to store and safekeep the collected data.
22. Graph best used to show trends in the behavior of a variable.
23. Data presentation best used when summarizing and highlighting important results.
24. The value in the center of the all the data set when all values are arranged in an increasing
or decreasing order.
25. Question where the respondent is asked to rank a given selection.
IV. [15 pts.] “Magsolve tayo, sumakit ang ulo ko, sumakit ang baywang ko!” Statistics for
ungrouped data: Solve the following questions below. Show your workings (solutions) to
receive full points. You may use a calculator.
1. Consider the following exam scores with the highest possible score of 500:
127, 256, 158, 128, 116, 134, 243, 201, 499, 99, 199, 116, 222, 197, 251, 244, 123, 111,
10, 100
a. [8 pts.] What is the mean?
b. [2 pts.] What is the median?
c. [1 pt.] What is the mode?
d. [5 pts.] Examine the data. Are there values in it that we can consider as extremal and
rare? What are these values? (Hint: there are two)
e. [4 pts.] If we exclude these extremal values, what is the new value of the mean? What
will happen to the median and the mode?
