You have been hired by a local middle school to teach students about drugs and the harms of drug use. Being the statistician that you are, you want to see how effective your lecture is at increasing knowledge; therefore, you give them a pretest of 10 questions to measure their knowledge of drugs and the harms of drug use. After your lecture, you give the same students a posttest and measure their knowledge of drugs and the harms of drug use. BY HAND, Determine whether the students’ knowledge significantly increased as a result of your lecture. Use an alpha of .05. Pre Post 3 6 1 4 0 5 4 3 2 9 5 9 3 3 2 7 3 6 4 8
Correlation
Correlation defines a relationship between two independent variables. It tells the degree to which variables move in relation to each other. When two sets of data are related to each other, there is a correlation between them.
Linear Correlation
A correlation is used to determine the relationships between numerical and categorical variables. In other words, it is an indicator of how things are connected to one another. The correlation analysis is the study of how variables are related.
Regression Analysis
Regression analysis is a statistical method in which it estimates the relationship between a dependent variable and one or more independent variable. In simple terms dependent variable is called as outcome variable and independent variable is called as predictors. Regression analysis is one of the methods to find the trends in data. The independent variable used in Regression analysis is named Predictor variable. It offers data of an associated dependent variable regarding a particular outcome.
You have been hired by a local middle school to teach students about drugs and the harms of drug use. Being the statistician that you are, you want to see how effective your lecture is at increasing knowledge; therefore, you give them a pretest of 10 questions to measure their knowledge of drugs and the harms of drug use. After your lecture, you give the same students a posttest and measure their knowledge of drugs and the harms of drug use. BY HAND, Determine whether the students’ knowledge significantly increased as a result of your lecture. Use an alpha of .05.
Pre Post
| 3 | 6 |
| 1 | 4 |
| 0 | 5 |
| 4 | 3 |
| 2 | 9 |
| 5 | 9 |
| 3 | 3 |
| 2 | 7 |
| 3 | 6 |
| 4 | 8 |
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