You conducted a t test for independent means, and found that the t score equaled 0. This means that
A) the two population means must be equal.
B) the two population variances must be equal.
C) the two sample means must be equal.
D) the two sample variances must be equal.
C
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According to a classic study by Thomas and Chess, ratings on the major dimensions of temperament elicit three major classifications
a. inhibited, uninhibited, and neutral b. easy, difficult, and slow-to-warm-up c. wired, mellow, and average d. irritable, placid, and average
Hoda, an economically disadvantaged mother of four, is considering becoming a surrogate. What is one realistic concern that Hoda might have about surrogate motherhood?
A) About 50 percent of surrogate procedures result in multiple births. B) The success rate of surrogacy is only about 25 percent. C) Knowledge that their mother would give away a baby might cause insecurities in Hoda's children. D) Surrogate motherhood has been banned in 11 U.S. states and the District of Columbia.