1) Let f (x) = 2 + 5x be a linear regression line of a linear regression from Y to X. Then the following applies to the scatter plot: 1) The closer the points in the scatter diagram to the regression line drawn the stronger the correlation between X and Y. 2) The further the points in the scatter plot are from the regression line drawn away, the stronger the correlation between X and Y. 3) Only if all points lie exactly on the regression line drawn is the correlation between X and Y is strong. 4) The position of the points in the scatter plot has nothing to do with the strength of the correlation.
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.
Which of the following four statements is correct?
Note: Only one answer is correct per question.
1) Let f (x) = 2 + 5x be a linear regression line of a linear regression from Y to X.
Then the following applies to the scatter plot:
1) The closer the points in the
the stronger the
2) The further the points in the scatter plot are from the regression line drawn away, the stronger the correlation between X and Y.
3) Only if all points lie exactly on the regression line drawn is
the correlation between X and Y is strong.
4) The position of the points in the scatter plot has nothing to do with the strength of the correlation.
2) For the events A = "number of points when rolling the dice is two" and B = "number of points when rolling the dice
Rolling the dice is straight ":
* P (A \ B) is smaller than P (A).
* P (A \ B) is the same size as P (A).
* P (A \ B) is greater than P (A).
* No general statement can be made about the size ratio of P (A \ B) and
Do P (A).
3) If there are five people, the height is both in cm (variable X) and in meters (Variable Y) Which of the following statements about the empirical dispersion is correct?
* The two standard deviations sx and sy are equal.
* The two variances s2x and s2y are the same size.
* The two coefficients of variation vx and vy are equal.
* The two
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