My Experience about Math

Now I will tell my experience about mathematic from junior high school until senior high school. When I study at 1^st junior high school I didn’t like with mathematic. I didn’t understand with the teacher’s explain, may be I need adaptation with the new mathematic lesson at the new school. Beside that, I didn’t like with my mathematic teacher. As the result, my asses in the report book didn’t satisfy.

When I at 2^nd grade I could begin like with mathematic lesson, although the teacher was same. I could understand the teacher’s explaining. I really like mathematic when I at 3^rd junior high school. At the 3^rd grade the teacher was different from the 1^st and 2^nd grade. My teacher was clever when explain the lesson to the student, so him explanation was easy to understand. My teacher said that we must always do the exercise more and more so we can really understand with mathematic and not find the much difficulty. My teacher usually give some story about the person that success because they competent in mathematic, this story can be a motivation for me to like mathematic and effort to increase the mathematic ability. When I done the national final test, I didn’t suffer many difficulty and I am happy when I know my asses, I am satisfy with my asses.

The method that I got from my 3^rd grade teacher at the junior high school also applied at the senior high school. When I at the 1^st grade in senior high school, I still like mathematic and always do the exercise, but begin the 2^nd grade I felt more lazy to do the exercisse. At the 2^nd and 3^rd grade, I didn’t like with my teacher. At 2^nd and 3^rd grade, my teacher explain was difficult to understand, and didn’t me that felt this but all my friend at my class. This matter of course make me lazy to study mathematic.

From the story above, I can conclude that teacher has great role when they give the lesson to their student.

What I can reflect about psychological aspect if the student is confronted with the following question:

1. Find the intersection point between line x + 2y = 5 and 2x + 4y = 7!

a. (2, 6) b. (6, 2) c. (6, 7) d. (0, 0)

2. The set solution of equation 3x + 2y + 17 and 2x + 4y = 7 are ….

a. {(4, 3)} b. {(4, 4)} c. {(3, 3)} d. {(3, 4)}

3. Three years later Judi’s age become six times Erick’s age. Total age of them now is 68^th; Erick’s age now is ….

a. 10^th b. 11^th c. 12^th d. 13^th

My opinion if the students is given the problem above is depend on personality of each student because each student have a spirit indication that not same. There are students who feel happy, calm, anxiety, afraid, sure, confident, and etc, when they are given this problem. Spirit indications that occur among the students are not same. There are some factors that influence when the students do the problem, such as readiness, intelligence, calm and quiet, carefulness, and etc. the students will be seen calm, full concentration when they do this matter if the students have ready and understood the lesson so they have confidence when do this matter. Sometimes, we see the students that anxiety, less concentration, and show the strange behavior such as touch their head, see their friend with the hope get the answer from their friend, and sometimes make a trouble when the exam occur. This behavior indicated that the student usually less ready on the exam and sometimes don’t understand with the lesson.

However, the student that have high readiness and can understand the lesson better sometimes don’t reach the maximum result on their exam, may be their faithless because they don’t have self confident when do the matter, they feel that the matter is difficult to do, so this feeling shadow their brain.

The student that have skill of mathematics when they do the matter such as number 1 and 2 usually just substitute the value of the multiple choice answer to the question one by one and not use the mathematic formula that is given by their teacher. In the question with the multiple choice answer usually much of the student that uses the gambling method at the find the solution. This is do when the students don’t know how the method to find the answer.

SAMPLE PULLING TECHNIQUE

I. INTRODUCTION


A research of course has a relation with the conclusion because a research has a purpose to take a conclusion which can give useful information. To get the information about data of this research will be related to take the sample and calculate the statistic value. Whereas the statistic value depend on values of sample which is observed, therefore the statistic value will be various from the sample to the other sample.

In order to the conclusion that we take is useful and appropriate with our desire, so at the sample pulling must précis to get the information that we need. At the next part we will explain about technique in the sample pulling at a research.


II. DISCUSSION


At the statistic we know some method of the sample pulling that may be more efficient, in the meaning that can give information that more great quantities about this populations without extra cost. There are three methods at the sample pulling, that are systematic sample pulling, random stratified pulling, and assemble sample pulling.

1. Systematic Sample Pulling

Systematic sample pulling take every substance to-n in the population, to become sample with the starting point that is fixed random between n substances at the first. For example every thing to-10th is taken as a sample to investigate, or every person that to-25th in the phone book is interviewed, and etc.

Systematic sample very easy to get and it is used with assume like random sample. Systematic sample can produce the conclusion that more appropriate about population parameter, because research values of the sample spread evenly in the whole population. But, the fact dangerous in the systematic sample pulling is if the interval sample pulling that we choose is same with period that hidden in the population.

2. Random Stratified Sample Pulling

This method is taken the simple sample from every stratified population. In this method population is partitioned become some stratified, so relative homogenous in the every stratified. For example, to research teacher’s income at a city may be will be better if this population is partitioned according to profession and next in every profession is taken the simple random sample. Thus, we will get the income variety in every profession more little than the income variety in the whole population. Decrease of the variety in every stratified will produce value that more appropriate to mid value of population, so a stratified random sample that has fixed measure more efficien than simple random sample with the same measure.

3. Assemble Sample Pulling

Assemble sample pulling take some assemble random from population and next take the whole, or choose random a part of substance from every assemble that is choosed to become sample. This method more efficien in cost if the population is spread extensively. For example, at the research about sleep at the afternoon habit of the person at the city, will more cheap if we interview and collect the data from the people that stay closed in assemble or the area that take random, than take simple random sample from whole the people in this city.


III. CONCLUSION


From this explanation we can take conclusion that the three methods are more efficien in cost problem and can give information more great quantities, so in pull the conclusion can more appropriate.

Three methods above, can use together in a research. For example if we want to research the society opinion about international school, we can see the area as assemble, and then take election area with the random stratified. Next, we can use systematic sample pulling to interview the people in the election area that is elected.


REFERENCE


Walpole, R. E. 1995. Pengentar Statistika Edisi ke-3. Jakarta: PT Gramedia Pustaka Utama

Admojo, Suwondo dan Darsono. 2005. Kamus Lengkap. Semarang: CV Widya Karya