Correlational coefficients are commonly used measures one encounters in behavioral science research papers and scholarly publications. Correlation coefficients...
a. can range from a minimum negative value of -100.0 to a maximum positive value of 100.0
b. are not appropriate statistical measures if the sample size for a study exceeds 25 cases
c. need cautious analysis since r2 can differ widely between samples and populations
d. are most appropriate when nominal scales are used as the unit of measure
e. None of the above