Problem set # 7 A. Solve as indicated. Solutions are needed. 1. Students in a class of 50 are classified according to grade range as follows: Grade Range Number of students 95 - 100 3. 90 - 94 12 85 -89 25 80 -84 8 75-79 If student is selected at random, Find the probability that the students has a grade range as follows: a) from 90 to 94 d) of at least 85 b) from 80 to 89 e) of at most 89 c) from 75 to 79 or from 95 to 100
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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