If the standard deviation of one of the variables equals zero, r cannot be calculated
Indicate whether the statement is true or false
T
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At the end of the menstrual cycle in women, the levels of LH and FSH ____; the levels of estradiol and progesterone ____
a. decrease; increase b. increase; decrease c. increase; increase d. decrease; decrease
The distribution of z-scores is always
a. positively skewed. b. negatively skewed. c. the same shape as the distribution of raw scores. d. more spread out than the distribution of raw scores.
The 4-H Club longitudinal study (Bowers et al., 2014) of students who progressed from the 5th grade to the 12th grade found that adolescents were more likely to successfully connect with an influential nonparental adult if they experienced
a. higher maternal warmth. b. less involvement of the parents in the school. c. looser parental monitoring. d. lower maternal warmth.
You decide to observe the behavior of children in day care. A few days before you are to start data collection you go the center and sit quietly to the side of the room. When the children speak to you, you respond as little as possible. You are
a. attempting to be unobtrusive. b. not going to get good data if you do not interact. c. probably not very good with children. d. trying to warm up the children so that they notice you.