Sanizah’s Notes 02/05/2013 1 sanizah@tmsk.uitm.edu.my 2 CHAPTER 5 CORRELATION AND REGRESSION Introduction Correlation and Regression Scatter Plot/Diagram Coefficient of Correlation Simple Linear Regression sanizah@tmsk.uitm.edu.my Learning objectives • Explain the concept of correlation • Calculate Pearson’s correlation coefficient and interpret the results • Calculate Spearman’s rank correlation for qualitative and quantitative data and interpret the results • Determine the
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the research. Your hypothesis might be that there is a positive correlation (for example‚ the number of hours of study & your midterm exam scores)‚ or a negative correlation (for example‚ your levels of stress & your exam scores). A perfect correlation would be an r = +1.0 & -1.0‚ while no correlation would be r = 0. Perfect correlations would almost never occur; expect to see correlations much less than + or - 1.0. Although correlation can’t prove a causal relationship‚ it can be used for prediction
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Is Life Expectancy More Correlated with Obesity or Poverty? Hypothesis: When obesity and poverty rates are tested to see which is more correlated with life expectancy I would expect poverty to be more correlated and for it to be a negative correlation as well. I say this because obesity is in a way a subcategory of poverty. For example‚ people who are poorer tend to buy the less healthy foods because they are at a cheaper price‚ thusly causing obesity. Procedure: Research and Identify the obesity
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Table of Contents Frequencies: Statistics RESPONDED GENDER HSC GPA STUDY HOUR N Valid 75 75 75 Missing 0 0 0 Mean 1.51 4.8520 4.5600 Median 1.51a 4.9442a 4.5094a Mode 2 5.00 4.00 Std. Deviation .503 .23673 1.00324 Variance .253 .056 1.006 Skewness -.027 -1.608 .408 Std. Error of Skewness .277 .277 .277 Kurtosis -2.055 1.864 -.117 Std. Error of Kurtosis .548 .548 .548 Range 1 1.00 4.00 Sum 113 363.90 342.00 Percentiles
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Conclusion Appendix Research Question to what extent is the correlation between the rate of mortality between the drinking and the normal mortality To what extent is the mortality due to consumption of alcohol when compared to normal mortality. Methodology:- 1) Collect the data of the road accidents of the United States of America. 2) Organise data into table 3) Plot the bar graph and analyse the data 4) The correlation coefficient 5) Draw conclusion from my analysis 6) Confirm conclusion
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IMC revolutions Whats the sense in using mass media for everyone? It is much easier‚ not effective. The entire industry has changed‚ advertising agency: The Traditional Structure. In the 80s‚ later on in the 90s‚ some mega groups of advertising groups or marcom groups have developed : WPP‚ biggest one. WPP- own fully dozens of companies‚ some of them are doing advertising and some are doing digital marcom‚ some are doing PR Now they can provide a one stop shop for their clients‚ for the client
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newspaper reporters‚ talk-show hosts‚ or television newscasters. The Most common problem in interpreting correlations is Third-Variable Problem. A correlation simply indicates that there is a weak‚ moderate‚ or strong relationship (either positive or negative)‚ or no relationship‚ between two variables. When interpreting a correlation‚ it is also important to remember that although the correlation between the variables may be very strong‚ it may also be that the relationship is the result of some third
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talks about the link between different things. It is important to understand that correlational research does NOT tell us that Variable A caused Variable B‚ but rather that they are somehow related. For example‚ if I told you that there was a correlation between domestic violence (violence between family members) and bowling‚ you would look at me strangely. But there is a relationship between the variables (variable 1- domestic violence‚ and variable 2- bowling). As more people bowl in the US
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Grounded Theory 5 5 Case study 5 5.1 Developing a Coding Framework 6 Developing codes. 6 Conceptualization. 6 Developing Categorizations. 6 5.2 Results of Data analysis 7 Descriptive statistics. 7 Correlations. 12 6 Discussion 20 6.1 Analysis of further correlations 20 What is liked and loved?. 20 When do users seek help via Facebook?. 20 Does time matter? 21 When do people use which speech component? 21 What is a Facebook user daily schedule? 22 What do Facebook
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simple regression analysis involves a single independent‚ or predictor variable and a single dependent‚ or outcome variable. This is the same number of variables used in a simple correlation analysis. The difference between a Pearson correlation coefficient and a simple regression analysis is that whereas the correlation does not distinguish between independent and dependent variables‚ in a regression analysis there is always a designated predictor variable and a designated dependent variable. That
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