Find the means, variances and covariance of Y, and Y
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- what does it means that the variable are positively correlated?If r? value is positive, then the correlation coefficient can be positive or negative. TRUE FALSEIn correlational research the Null hypothesis states that Choose one the correlation coefficient is 0 or The correlation is significantly different between groups or the correlation coefficient is 1.00 or -1.00
- The top portion of the Pearson's r correlation coefficient equation calculates the______ whereas the bottom portion calculates the___ 1)variance of x and the variance of y; covariance between variables x and y 2)covariance of variable ×; covariance of variable y 3)covariance between variables x and y; variance of x and the variance of y 4)covariance of variable v: covariance of variable x.What are some of the possible reasons for large correlations betwen a pair of variables, X and Y?Two statistically independent random have variances of Variables X and 0² and new ran- dom T variables Y 54 are + = 25. TWO defined by U = 3x + 4 Y V = 5X-2Y
- Squaring the Pearson correlation coefficient (r2) tells us thatWhich of the following are attributes of correlation? Ocorrelation is bounded by +1 and -1 correlation is a measure of linear dependency a correlation of 0 does not mean that 2 variables are independent independent variables have 0 correlationWhat does it mean if the linear correlation coefficient is A) 0? B) -1?