Mathematics

Mathematics, 17.07.2019 04:50, Apple557

Suppose the correlation between two variables x and y is due to the fact that both are responding to changes in some unobserved third variable. what is this due to?

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Mathematics, 15.07.2019 22:10, keymariahgrace85

11.) suppose the correlation between two variables r=0.23. what will the new correlation be if 0.14 is added to all values of the x-variable, every value of the y-variable is double, and the two variables are interchanged?

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Mathematics, 19.07.2019 15:30, mbarron279542

20 points pls match the vocabulary word with its correct definition: question 2 options: lurking variable line of best fit correlation coefficient correlation causation 1. a third variable affecting the relationship between two variables being studied. 2. another name for a least squares regression line. 3. represented with the variable r. a number used to describe direction and strength of the association between two variables. 4. the relationship between two variables. it can also be referred to as "association". 5. the relationship between two variables when a change in one variable causes a change in the other variable.

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Mathematics, 28.07.2019 19:40, smelcher3900

Me suppose the correlation between two variables x and y is due to the fact that both are responding to changes in some unobserved third variable. what is this due to? a. common sense b. cause and effect between x and y c. extrapolation d. the effect of a lurking variable e. none of the above suppose a straight line is fit to data having response variable y and explanatory variable x. what is the term for predicting values of y for values of x outside the range of the observed data? a. correlation b. extrapolation c. causation d. sampling e. asymptotically stupid how can the relationships between categorical data be displayed? a. scatterplot b. residual plot c. table d. graph of linear regression model two or more explanatory variables that are separated best describes which of the choices below? a. lurking variable b. confounding variable c. simpson's paradox d. extrapolation a correlation indicates causation. a. true b. false

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Mathematics, 06.10.2019 10:30, pevin2955

Identify the true statements about the correlation coefficient, if two variables are negatively correlated, when one variable increases, the other variable also increases. the correlation coefficient is not affected by outliers. a correlation coefficient of zero means that no relationship exists between the two variables. the sign of describes the direction of the association between two variables. when the data points in a scatter plot are randomly scattered, the correlation between the two variables is weak. the value of ranges from negative one to positive one.

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