Suppose a researcher has made a decision that a certain pill is not effective at treating depression when, in reality, it is. What has the researcher done in this case?
a. The researcher has made a Type II error.
b. The researcher has made a Type I error.
c. The researcher has made a correct decision to reject the null hypothesis.
d. The researcher has made a correct decision to reject the alternative hypothesis.
a
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Wilfred has an identical twin brother who has just been diagnosed with schizophrenia. The odds that Wilfred will develop schizophrenia during his lifetime have:
a. dropped from 1 in 2 to approximately 1 in 10 b. not changed because schizophrenia is not related to genetics c. jumped from approximately 1 in 100 to 1 in 200 d. jumped from approximately 1 in 100 to 1 in 2
Infants' repetition of certain syllables at the age of about 6 or 7 months is called
cooing. holophrasing. gurgling. babbling.
Nathan suddenly lets out a high-pitched cry, lowers his eyebrows, and purses his lips. You would be safest in assuming that Nathan is
A. happy. B. cold. C. experiencing pain. D. playing peek-a-boo.
Which of the following is regulated by the thyroid gland?
a. Metabolism b. Blood sugar levels c. Pain relief d. Sexual motivation