Research has demonstrated that full siblings compared to half-siblings are ____ to invest in one another
a. more likely c. somewhat less likely
b. just as likely d. very unlikely
A
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If a researcher is using a t statistic to test a null hypothesis about a population, what information is needed from the population to calculate the t statistic?
a. You must know the population mean. b. You must know the population variance or standard deviation. c. You must know the population mean and the variance or standard deviation. d. The t statistic does not require any information about the population.
Sexually transmitted diseases (STDs) that can be prevented by using a condom and safer sex practices include which of the following?
a. gonorrhea and syphilis b. chlamydia and pelvic c. inflammatory disease genital herpes and HPV aka d. all of these
An advantage of randomly assigning subjects to groups is that it:
a. makes the groups equal in number b. reduces the chance that other variables will bias the results c. ensures that the best subjects will be assigned to the experimental group d. makes the groups as different as possible from each other
The 5-year-old child of two very busy parents has been throwing tantrums. Whenever the child gets angry or upset, one or both of his parents immediately come to his side and fuss over and cajole him. Nevertheless, his tantrums do not diminish. In fact, th
We may assume that for this child his parents' fussing over him serves as a(n) ______. a. negative reinforcer c. positive reinforcer b. punisher d. unconditioned response