Homework Answers
(b) Scatter plot.
A scatter plot can suggest various kinds of correlations between variables and it is obtained by plotting one variable on X axis and other variable on Y axis. If the plotted points slopes from lower left to upper right, it indicates a positive correlation, and if the plotted points slopes from upper left to lower right, it indicates a negative correlation. If there is no such trend indicates absence of correlation. ( no correlation.
Other options
(a) Correlation coefficient is a number and is a measure of association between two variables.
(c) A histogram is a graphical representation of the data to get an idea about the distribution of data. It is for one variable. Height of a bar in histogram represents frequency density of that interval
(d) A frequency polygon is constructed by joining the frequencies in each interval taking mid point of each interval in X axis, The heights of the points represent the frequencies of that particular interval.
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А --- is a graphical representation of the relation between two variables. a correlation coefficient Ob...
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Compute the linear correlation coefficient between the two variables and determine whether a linear relation exists. Round to three decimal places X y 2 1.3 3 1.6 5 2.1 5 2.2 6 2.7 Click the icon to view the critical values table, A 0.983, a linear relation exists OB. r=0.883; a linear relation exists O C 0.883; no linear relation exists O D . r=0.983; no linear relation exists
Consider a two-dimensional scatterplot representing the relationship between two continuous variables. If the correlation coefficient is...
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help Question 11 2 pts If the coefficient of correlation between two variables is-0.6, the coefficient of determina...
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Question 11 2 pts If the coefficient of correlation between two variables is-0.6, the coefficient of determination will be: e 0,4. -0.6 -0.36. 0.6 0.36
Question 11 2 pts If the coefficient of correlation between two variables is-0.6, the coefficient of determination will be: e 0,4. -0.6 -0.36. 0.6 0.36
1) The correlation coefficient determined for two variables has a value of 0.89. Describe, in words,...
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If correlation coefficient between two random variables is zero, then it can be certain that they...
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Which of the following is FALSE about Correlations: We can use the Pearson Correlation Coefficient when...
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Compute the linear correlation coefficient between the two variables and determine whether a linear relation exists. Round to three decimal places X y 2 1.3 3 1.6 5 2.1 5 2.2 6 2.7 Click the icon to view the critical values table, A 0.983, a linear relation exists OB. r=0.883; a linear relation exists O C 0.883; no linear relation exists O D . r=0.983; no linear relation exists
help
Question 11 2 pts If the coefficient of correlation between two variables is-0.6, the coefficient of determination will be: e 0,4. -0.6 -0.36. 0.6 0.36
Question 11 2 pts If the coefficient of correlation between two variables is-0.6, the coefficient of determination will be: e 0,4. -0.6 -0.36. 0.6 0.36
If correlation coefficient between two random variables is zero, then it can be certain that they are also independent True False
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