Similar to other inferential statistics, the chi-square test statistic has a distribution of values when the null hypothesis is true with a different shape based on the______.
A. Pearson r
B. Cohen's d
C. degrees of freedom
D. expected frequency
Answer: C
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In animals there are numerous signals that signal aggression and submission. According to ethologists, these signals are:
A. learned B. also found in humans C. largely programmed by genetic factors D. redundant
What type of caffeine did 16th century European explorers discover in Mexico?
a. coffee b. tea c. the cacao plant d. the kola nut
A critical-period view of language learning refers to
the sensitive time for prefrontal cortex development. the only time language can be learned. the best time to learn a language. second-language acquisition.
Operational definitions:
a. define concepts in terms of clearly observable, concrete operations that anyone can repeat. b. define terms conceptually. c. define events in terms of constructs. d. all of these