True or False A Wilcoxon matched -pairs test is used when there are two matched pairs. The paired t-test is best used when the measurement scale of the characteristic of interest is interval or ratio. Median is not used for non-parametric test. If the variances of the two groups being compared are significantly different, then we will always use the independent samples t-test for pooled variances. A researcher is interested in understanding the following question: Do children make more visit to a doctor’s office then adults. For this study the researcher should always use two Independent variables.
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.
Question 1: True or False
- A Wilcoxon matched -pairs test is used when there are two matched pairs.
- The paired t-test is best used when the measurement scale of the characteristic of interest is interval or ratio.
Median is not used for non-parametric test.- If the variances of the two groups being compared are significantly different, then we will always use the independent samples t-test for pooled variances.
- A researcher is interested in understanding the following question: Do children make more visit to a doctor’s office then adults. For this study the researcher should always use two Independent variables.
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