If the Coefficient of Correlation R = -

question 31

True/False

If the coefficient of correlation r = -.81,the standard deviations of x and y are 20 and 25,respectively,then cov(x,y)must be -405.0.

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Definitions:

The Survey

is a research method used to collect data from a predefined group of respondents to gather information and insights on various topics.

High School Grades

The evaluation of a student's performance in high school courses, usually represented by letters (A, B, C, etc.) or numbers.

College Grades

The system of evaluation used in higher education to assess the academic performance of students.

Correlation Coefficient

A statistical measure that indicates the extent to which two variables fluctuate together, showing the strength and direction of a linear relationship between them.