In the case of Lochner v. New York(1905), what did the Supreme Court find to be unconstitutional?

One problem, noted in your text, with recruiting research participants through the Internet is that

a. the participants may not be representative of non-Internet users. b. it is difficult to find diverse samples. c. contacting potential participants is difficult. d. most researchers are not "net savvy."

If two variables are very closely related to one another they are said to have ___________________.

Fill in the blank(s) with the appropriate word(s).