Which of the following is the most accurate example of a null hypothesis for a two-way ?2?
a. The frequency of smoking among college students is the same as that of the general population.
b. The frequency of smoking among college students is not the same as that of the general population.
c. Whether people smoke is related to their socioeconomic-status category.
d. Whether people smoke is unrelated to their socioeconomic-status category.
Ans: D
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Which of the following is a parametric inferential statistical test of the null hypothesis for a single sample where the population variance is not known?
a. z test b. t test c. Cohen's d d. The standard error of the mean
Outliers are
a. extreme or unusual values. b. the lowest value in a data set. c. the lowest and highest scores in a data set. d. all of the above
In the analysis of variance we will assume that
a. the populations are normally distributed. b. the populations follow a rectangular distribution. c. the populations all have completely different shapes. d. There is no assumption about the shape of the population.
It has been disputed whether psychologists and mental health professionals have the requisite experience to be profilers. According to one study examining psychologists and psychiatrists, ______ of the sample reported having profiling experience, while ______ considered themselves knowledgeable about criminal profiling
A. 25%; 10% B. 50%; 50% C. 10%; 25% D. 15%; 85%