The case of Samuel George Morton is strong evidence that:
a. randomized sampling is important.
b. a scientist can subtly influence the outcome of an experiment.
c. placebo effects cannot be controlled.
d. the performance of participants can be influenced by the experimenter's nonverbal communication.
Question 2
Psychologists report that if a single recording error is made by an experimenter, it is usually:
a. an error that would lead to the failure to reject the null hypothesis.
b. in support of the experimental hypothesis.
c. due to fraud.
d. due to the personal equation.
Polyploidy has been an important factor in the evolution of plants.
St. George Jackson Mivart
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