Suppose the hours spent studying each week for their statistics course for a random sample of 20 freshman, a random sample of 20 sophomores, a random sample of 20 junior, and a random sample of 20 senior college students were reported. At the 5% significance level, can you conclude that the average hours spent studying is different for the four grade classifications? Choose the choice below that gives the correct null and alternative hypothesis. Group of answer choices Ho: μ1=μ2=μ3=μ4 versus Ha: Not all are equal Ho: μ1=μ2=μ3=μ4 versus Ha: μ1≠μ2≠μ3≠μ4 Ho: p1 = p2 = p3 = p4 versus Ha: Not all are equal Ho: p1 = p2 = p3 = p4 versus Ha: p1 ≠ p2 ≠ p3 ≠ p4 E. Ho: independent versus Ha: dependent Ho: dependent versus Ha: independent
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.
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