scholarly journals The Accuracy of Balance Model in Predicting Stock Investment During The Covid-19 Pandemic on LQ 45 Index

2021 ◽  
Vol 4 (2) ◽  
pp. 215-227
Author(s):  
Elly Susanti ◽  
Nelly Ervina ◽  
Ernest Grace ◽  
Sudung Simatupang
Keyword(s):  
Stock Returns ◽  
Sampling Technique ◽  
T Test ◽  
Balance Model ◽  
Homogeneity Test ◽  
Arbitrage Pricing Theory ◽  
Absolute Deviation ◽  
Normality Test ◽  
Stock Investment ◽  
Capm Model

In doing investment, an investor certainly avoids risk; thus, the investor needs a model in making predictions to forecast the return of shares. There are two models to predict this: Capital Asset Pricing Capital (CAPM) and Arbitrage Pricing Theory (APT). The purpose of this study is to find out which models are more accurate in determining investment options, especially during the Covid-19 pandemic in companies that are included in the LQ 45 Index group. The population in this study is 50 companies listed in LQ 45 from February 2020 - July 2021. The sampling technique used in this study is purposive sampling. The data used in this study will be processed through Ms.Excel and SPSS Version 21. The data analysis techniques used in this study are the Basic Assumption Test consisting of Normality Test and Homogeneity Test, Mean Absolute Deviation (MAD), and hypothesis testing consisting of independent t-test samples. The results in this study show that Model is accurate in predicting stock returns in the Covid-19 pandemic is a CAPM model this is because the value of MAD CAPM is smaller than mad APT. Furthermore, independent t-test samples showed that H0 was rejected which meant that there was a difference in accuracy between CAPM and APT in calculating the return of LQ 45 shares. The implication of this study are expected to provide references to investors and potential investors as a source of information in decision making to make investments in this pandemic period.

scholarly journals The Use of Indirect Corrective Feedback to Eliminate Grammatical Errors in Students' Writing

2021 ◽  
Vol 3 (2) ◽  
pp. 146-156
Author(s):  
Yusna Hannum ◽  
Absharini Kardena
Keyword(s):  
Corrective Feedback ◽  
Sampling Technique ◽  
T Test ◽  
Homogeneity Test ◽  
Experiment Research ◽  
Grammatical Aspect ◽  
Normality Test ◽  
Grammatical Errors ◽  
Grammatical Error ◽  
Post Test

This study aimed to find out the effect of using indirect corrective feedback to eliminate grammatical errors in students' writing. This research was conducted at SMKN 1 Padang Panjang because most of students still encounter problems in mastering writing text especially grammatical aspect. Most of the students' writing was founded many of grammatical error. Then, the students still did not get the appropriate feedback of the teacher toward their errors. And, the teacher also did not give the spesific feedback or treatment to help the students in reducing the error. This research used pre-experiment research. The researcher used one-group pretest posttest design. To determine sample, the researcher used purposive sampling technique. The data got from the pre-test and post-test in experiment class. To analyze the data, the resercher used the normality test and homogeneity test by using SPSS Statistics20 and to test the hypothesis the researcher used t-test formula and consulted the result into t-table with level of significant a=0.05. From the result and accounting the post-test of experiment class,it was founded that using indirect corrective feedback in eliminate grammatical error had better result than without indirect coreective feedback. It can be seen by comparing the t-obtained (2) that higher than the t-table (1.706).

scholarly journals THE EFFECT OF USING CABRI 3DV2PLUS SOFTWARE WITH COOPERATIVE INTERACTION SETTING LEARNING MODEL ON STUDENTS' MATHEMATICAL UNDERSTANDING IN TRANSFORMATION MATERIALS

2019 ◽  
Vol 3 (1) ◽  
pp. 50
Author(s):  
Nur Asiah Batubara
Keyword(s):  
Random Sampling ◽  
Sampling Technique ◽  
Learning Model ◽  
Mathematical Understanding ◽  
T Test ◽  
Cooperative Interaction ◽  
Homogeneity Test ◽  
Average Difference ◽  
Normality Test ◽  
Quasi Experimental

This study is aimed at identifying the effect of using Cabri 3DV2Plus software with a learning model of cooperative interaction settings of students who get conventional learning seen from the level of students' abilities (high, medium, or low). The research uses a quasi-experimental method. The population in this study were students of class XI. The sampling technique was done by random sampling, and a sample of 182 students was obtained. The instrument used in this study was a test of mathematical understanding. The data collection techniques for mathematical understanding were carried out by giving a pretest and a posttest. The statistical analysis carried out was a normality test and a homogeneity test as a condition for taking the treatments, and a t-test to see the average difference in each class. From the t-test, the tcount and ttable values were obtained respectively. tcount1 = 11.20  ttable = 2.042, tcount2 = 9.819  ttable = 2.042, and tcount3 = 4.861  ttable = 2.042 then overall H0 is rejected; meaning that there is influence of using Cabri 3DV2Plus software with the learning model of cooperative interaction settings of students who get conventional learning in terms of the level of students' ability (high, medium, or low).

scholarly journals The Effect of Using Pair Check and Snowball Throwing Learning Models on Students' Problem Solving Ability

2020 ◽  
Vol 5 (1) ◽  
pp. 38-48
Author(s):  
Juliana Dwi Maulidiya
Keyword(s):  
Problem Solving ◽  
Control Design ◽  
Sampling Technique ◽  
Learning Model ◽  
T Test ◽  
P Value ◽  
Homogeneity Test ◽  
Problem Solving Skills ◽  
Normality Test ◽  
Spss Software

            The research abaut the effect of the use of the pair check and snowball throwing learning model on problem solving abilities was carried out with the aim of recognizing the influence of the use of the model on problem solving abilities. The research was conducted in SMP 06 Diponegoro with 27 respondents in VIII A and 30 students in VIII B who were taken with the Purposive Sampling technique. This type of research is a true-experimental research with a Posttest-Only Control Design and uses a quantitative approach. The method taken in this research is test and documentation. The data analysis that used is normality test, homogeneity test, and t test (Independent T Test) with the help of SPSS software version 20.0. Based on the research results obtained p-value 0.02 < 0.05 then Ha is accepted and Ho is rejected. Thus it can be said that there is an effect on the use of the pair check and snowball throwing learning model on students' problem solving abilities Keywords: pair check, snowball throwing, problem solving skills

scholarly journals Penerapan Model Pembelajaran Kooperatif Tipe Think Pair Share Terhadap Peningkatan Kompetensi Belajar Ilmu Pengetahuan Alam [Implementation of Think Pair Share Cooperative Learning Model on the Improvement of Science Learning Competencies]

2019 ◽  
Vol 8 (2) ◽  
pp. 265
Author(s):  
Rina Gusmiharti ◽  
Rahmadhani Fitri
Keyword(s):  
Cooperative Learning ◽  
Sampling Technique ◽  
Learning Model ◽  
T Test ◽  
Control Group ◽  
Homogeneity Test ◽  
Model Type ◽  
Normality Test ◽  
Class Viii ◽  
Learning Competencies

This study aims to look at the effect of the cooperative learning model type Think Pair Share on the improvement of the students' learning competencies in the material in the class VIII Excretion System in SMP 6 . This research is an experimental study with a Randomized Control Group Only Design study design. Sampling is done by using sampling technique, which is selected class VIII 2 as the experimental class and class VIII 1 as the control class. The research instrument used was the question for knowledge competence, the observation sheet for attitude competence. The hypothesis in this study was tested using a t test which was first carried out a prerequisite test, namely the normality test and homogeneity test. Based on the t-test it is known that the competencies of knowledge and competence in the attitude of &gt; t table are (2.56&gt; 1.67) and (5.48&gt; 1.67). This shows that the hypothesis is accepted. So it can be concluded that the application of the cooperative learning model type Think Pair Share can improve students' learning competencies in SMP 6 .

scholarly journals PEMBELAJARAN DARING MATEMATIKA BERBANTUAN GOOGLE CLASSROOM DITINJAU DARI GAYA BELAJAR PADA MASA PANDEMI

2021 ◽  
Vol 9 (3) ◽  
pp. 333-342
Author(s):  
Yunti fahrulia Subekti
Keyword(s):  
Learning Styles ◽  
Learning Outcomes ◽  
Mathematics Learning ◽  
Visual Learning ◽  
Sampling Technique ◽  
Simple Random Sampling ◽  
Control Group ◽  
Homogeneity Test ◽  
Control Group Design ◽  
Normality Test

The purpose of the study was to determine the differences in mathematics learning outcomes and the effectiveness of google classroom-assisted learning in terms of learning styles on students' mathematics learning outcomes. This research used an experimental research method with a randomized pretest-posttest control group design. Sampling using a simple random sampling technique. The population of this research is the seventhgrade students of one of the public junior high schools in Sleman. The sample of this study amounted to 54 students consisting of class VII C and VII D. The data collection techniques used in this study were tests and questionnaires. The data analysis techniques used in this study were normality test, homogeneity test, similarity test, and hypothesis testing. The results of the study show that: (1) there are differences in learning outcomes in bold learning assisted by google classroom; (2) bold learning assisted by google classroom is more effective in terms of visual learning styles; (3) bold learning assisted by google classroom is not more effective in terms of auditory and kinesthetic learning styles.

scholarly journals Pengaruh Substitusi Tepung Kedelai terhadap Kualitas Biskuit

Media Wisata ◽  
2021 ◽  
Vol 16 (2) ◽  
Author(s):  
Heni Susilowati ◽  
Adi Prabowo
Keyword(s):  
Sampling Technique ◽  
Subjective Assessment ◽  
Soy Flour ◽  
P Value ◽  
Homogeneity Test ◽  
Soybean Flour ◽  
Normality Test ◽  
Significant Difference ◽  
Different Types ◽  
Sensory Tests

The research entitled The Effect of Substitution of Soybean Flour on Biscuit Quality is a type of research using a quantitative approach with an experimental method. The purpose is to know the effect of quality biscuits with soybean flour substitution with a different percentage that is equal to 50%, 25% and 10% viewed from the aspect of colour, flavour, aroma and texture. The experiments used 3 different types of treatment on the percentage of soy flour used ie, biscuit A with 50% soy flour, biscuit B with 25% soy flour, and C biscuits with 10% soy flour. Methods of data collection using subjective assessment of sensory tests taken from the results of a panellist assessment that includes assessment of colour, aroma, taste and texture on biscuits. The panel of researchers was 30 people taken by random sampling technique with considerations that included panellist knowledge about the sensory properties of biscuits in general. Methods of data analysis to test the hypothesis using the analysis of single classification variables and Tukey test, previously conducted precariat test that is homogeneity test and normality test. The result of the research with Anova test seen from the color aspect shows that (significant value (p-value) <0,05 = 0,000 <0,05) shows that there is significant difference from three substitution biscuit substitution biscuit, while from aroma aspect shows significant (p-value) <0,05 = 0,008 <0,05) indicated that there were significant differences from the three soybean substitution biscuit samples. Seen from the texture aspect showed (significant value (p-value) <0,05 = 0,000 <0,05) indicated that there was significant difference from three sample of soybean substitution biscuit. In terms of taste taste (significant value (p-value) <0.05 = 0.005 <0.05) indicates that there are significant differences from the three soybean substitution biscuit samples.

scholarly journals Students' Perceptions of the Physics-Mathematical E-Module on Partial Differential Material Based on Gender

2021 ◽  
Vol 54 (3) ◽  
Author(s):  
Astalini Astalini ◽  
Darmaji Darmaji ◽  
Dwi Agus Kurniawan ◽  
Mashelin Wulandari
Keyword(s):  
Gender Differences ◽  
Physics Education ◽  
Quantitative Research ◽  
Teaching And Learning ◽  
Sampling Technique ◽  
Simple Random Sampling ◽  
T Test ◽  
Homogeneity Test ◽  
Partial Differential ◽  
Class A

Based on the observations in mathematics physics I, several obstacles were found in teaching and learning activities such as the lack of teaching materials that were easily understood by students. This is because the main books used are books in English as a whole. Therefore, the researcher developed an electronic book, namely the e-module of mathematical physics I on partial differential material created using the 3D PageFlip Professional application. The type of research used is a comparative type of quantitative research. The population in this study were students of physics education class 2019 with a sample of 80 regular classes A and B. The sampling technique used is simple random sampling. The data were analyzed by descriptive and inferential statistics using the IBM SPSS Statistic 25 application consisting of descriptive test, normality test, homogeneity test, and t-test. In the assumption test, the data is normally distributed and homogeneous so that a t-test can be performed. The t-test obtained a sig value of 0,043 for gender differences in class A, and 0,010 for gender differences in class B. So it can be concluded that Ho is rejected and Ha is accepted, meaning that there are significant (significant) differences in perceptions based on gender in each. class A and B. Where the perception of female students is higher than the perception of male students, but overall students gave a good perception of the mathematics physics e-module on partial differential material.

scholarly journals ANALISIS PERBEDAAN HARGA SAHAM, RETURN SAHAM, DAN ABNORMAL RETURN SEBELUM DAN SESUDAH STOCK SPLIT PADA PERUSAHAAN HIGH PROFILE DAN LOW PROFILE YANG TERDAFTAR DI BURSA EFEK INDONESIA

2021 ◽  
Vol 11 (1) ◽  
pp. 42
Author(s):  
Pita Rahmawati ◽  
Jawoto Nusantoro ◽  
Gustin Padwa Sari
Keyword(s):  
Stock Returns ◽  
Stock Prices ◽  
Abnormal Returns ◽  
T Test ◽  
Paired Sample ◽  
High Profile ◽  
Normality Test ◽  
Low Profile ◽  
Stock Split ◽  
Before And After

This research aims to determine whether there are differences in stock prices, stock returns and abnormal returns before and after a stock split in high profile and low profile companies. The research period used in this study was on 2016-2018. The research was analyzed in quantitative method by using a purposive sampling method. Based on the sampling criteria, 40 companies were selected as research samples. Kolmogorov Smirnov One Sample test was used for the normality test. After the normality test was carried out, the data was processed using the two paired-sample difference test. The t-test (paired sample t-test) was used if data were normally distributed but if it was not normally distributed the Wilcoxon Signed Rank test would be used. Hypothesis testing results showed that (1) there are differences in stock prices whether before and after a stock split in high profile companies (2) there are differences in stock prices whether before and after the stock split in low profile companies (3) there are differences in stock returns whether before and after a stock split in the company high profile (4) there is no difference in stock returns whether before and after the stock split in low profile companies (5) there is no difference in abnormal returns whether before and after the stock split in high profile companies (6) there is no difference in abnormal returns whether before and after the stock split in low profile companies (7) there are differences in stock prices after a stock split in high profile companies and low profile (8) there is no difference in stock returns whether before and after the stock split in high profile and low profile companies (9) there is no difference in abnormal stock returns whether before and after a stock split at high profile and low profile companies.

scholarly journals The effectiveness of audio visual learning media towards badminton basic technical skills

2019 ◽  
Vol 5 (1) ◽  
pp. 55
Author(s):  
Romi Cendra ◽  
Novri Gazali ◽  
M. Rian Dermawan
Keyword(s):  
Visual Learning ◽  
Measurement Techniques ◽  
Sampling Technique ◽  
Technical Skills ◽  
Visual Media ◽  
Control Group ◽  
Homogeneity Test ◽  
Normality Test ◽  
Post Test ◽  
Academic Year

The purpose of this study was to know the effectiveness of audio-visual media towards badminton basic technical skills of Penjaskesrek students of Islamic University of Riau. This study used an experimental quasi method with pre-test and post-test design. The form of research design used in this study was Pretest-Posttest Design Control Group. This research was conducted at Islamic University of Riau from May to September 2018. The data collection method used in this study was using test and measurement techniques, and the test instrument was basic badminton skills test. The population in this study was the active Penjaskesrek students of Islamic University of Riau in the academic year of 2015/2016 with a number of 219 students from 8 classes. The sampling in this study was conducted by using purposive sampling technique. The samples taken were only two classes from eight classes, namely 4C and 4G. 4C class, 19 students was the experimental class group while the 4G class, 22 students was the control class. The data collected from the results of the initial and final tests were analyzed by using normality test, homogeneity test and t-test statistics. The conclusion in this study was that the audio visual learning media provided significant effectiveness towards badminton basic technical skills of Penjaskesrek students of Islamic University of Riau, where the results obtained by tcount (10.64) which was greater than ttable (1,734).  

scholarly journals PENGARUH MODEL QUANTUM LEARNING TERHADAP KETERAMPILAN MENULIS PUISI SISWA KELAS X AKUNTANSI SMK NEGERI 2 KOTA JAMBI

2020 ◽  
Vol 3 (2) ◽  
pp. 122
Author(s):  
Abdoel Gafar ◽  
Agustina Aritonang
Keyword(s):  
Sampling Technique ◽  
Learning Model ◽  
Average Score ◽  
Homogeneity Test ◽  
Significance Level ◽  
School Year ◽  
Normality Test ◽  
Quantum Learning ◽  
The Impact ◽  
Accounting Major

This research aims to describe the impact of of quantum learning model towards students ability in writing poetry at class X of accounting major SMK Negeri 2 Jambi City school year 2018/2019. The design of this research uses quasi experiment with a quantitative approach. Sampling was carried out using the purposive sampling technique of the X-grade students of SMK Negeri 2 Jambi City. It is obtained that class X of accounting 2 as the experimental class and class X of accounting 3 as the control class. The research results show that the average score of the experimental is 80.42 and the average score of control class is 74. After testing the normality test, the experimental class sig score is 0.170 > 0.05 and the control class sig score is 178 > 0.05 (significance level). Thus it can be concluded that the data of the two classes is fall intro category of normal distribution. From the homogeneity test, it is obtained that sig score is 0.462 > of a significant level (α = 0.05) Thus it can be concluded that both classes have the same or homogeneous variants. Hypothesis testing uses SPSS 20 applications. T test of two independent samples shows that SIG T count 0,043 < 0.05 then Ho is rejected Ha is received. So, the results of students ability in writing poetry at class X of Accounting at SMK Negeri 2 Jambi city that use quantum learning model is better than the learning outcomes of students who use conventional learning.

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