Tamara wants to know how many subjects she should use in her study. To answer this question, Tamara should
a. calculate the study's effect size.
b. use null hypothesis significance testing.
c. conduct a power analysis.
d. construct a BESD.
c
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Older fathers are more likely to have offspring with __________.
A. increased IQ B. better social functioning C. schizophrenia D. no mental disorders
Once a zygote implants itself in the lining of the uterus, it becomes a fetus
a. True b. False Indicate whether the statement is true or false
Which of the following is NOT true of distributions?
A. A good way to visualize distribution is a frequency distribution graph. B. There are many different shapes of distributions. C. Shape of distribution does not depend on how the data are collected. D. Shape of distributions determines how we analyze the data.
Which of the following is the best explanation of internal validity?
a. The extent to which the data are characterized by equal intervals between numbers on the scale b. The extent to which the results are representative of situations that occur outside of the laboratory c. The extent to which researchers know if their manipulation of the IV caused changes in the DV d. The amount of variability across participants that is due to characteristics of the participant