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Jul
Compute The Value Of The Correlation Coefficient. If b 1 is negative then r takes a negative sign. Correlation coefficient is used to determine how strong is the relationship between two variables and its values can range from -10 to 10 where -10 represents negative correlation and 10 represents positive relationship. We first summarize the gestational age data. R pm sqrtr2 The sign of r depends on the sign of the estimated slope coefficient b 1.
ΣXY sum of the product of both scores. The value of the test statistic t is shown in the computer or calculator output along with the p-value. The value of the correlation coefficient ranges from -1 to 1. A coefficient of 1 represents a perfect positive correlation. If the values are positive the correlation is positive. Round to three decimal places.
The correlation coefficient r is directly related to the coefficient of determination r 2 in the obvious way.
Compute the value of the correlation coefficient. The test statistic t has the same sign as the correlation coefficient r. Sum x Sum of 1st values list. The correlation coefficient is a value between -1 and 1. By observing the correlation coefficient the strength of the relationship can be measured. Likewise if the values are negative the correlation is negative.