What are covariance and correlation and what can they tell us about data?
What will be an ideal response?
Covariance and correlation are methods by which to determine whether or not there is a relationship between two variables. Both methods can describe whether the relationship between the two variables is positive or negative. A negative relationship occurs when one variable decreases, and the other variable increases. A positive relationship occurs if both variables increase together. Correlation not only describes the type of relationship but also the strength of that relationship by returning a value known as a correlation coefficient, which is a value between -1 and
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Constraining a type parameter in a generic class
A) causes programs to compile faster B) was added to Java in version 1.3 of the language C) can only be used when the generic class will be used as a superclass for other classes D) restricts the types that can be used as type arguments
Identify the letter of the choice that best matches the phrase or definition.
A. To modify a file's attributes to eliminate bottlenecks in a given frame during downloading B. To instruct Flash to create the files necessary to display a movie on the Web C. File format used extensively for optimizing images for the Web D. File format with limited image quality but the capability for transparency E. File format that supports higher resolution images and transparency