If you examined the effect of studying 0, 1, or 2 hours a day on grades, how could you write the alternative hypothesis?
a. µ1 - µ2 - µ3 = 0
b. µ1 = µ2 = µ3
c. All µ are not equal.
d. Not all µ are equal.
d
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Which of the following is true of the best-fitting line?
a. It establishes statistical significance. b. It increases as the correlation decreases. c. It is rarely useful for prediction. d. It minimizes residuals.
Erin had been single for several years after her divorce. Frustrated with dating, her friend suggested that Erin travel to China to meet her brother who was also single. Although Erin was American and did not speak Chinese, she decided to travel to China for three weeks to meet her friend's brother. According to the Big Five Theory of personality, this behavior suggests that Erin is high in
A. conscientiousness. B. agreeableness. C. neuroticism. D. openness.
Which area of the brain serves as a routing center?
a. amygdala b. thalamus c. hypothalamus d. diencephalon
An independent-measures research study uses two samples, each with n = 12 participants. If the data produce a t statistic of t = 2.50, then which of the following is the correct decision for a two-tailed hypothesis test?
A) ?Reject the null hypothesis with ? = .05 but fail to reject with ? = .01. B) ?Reject the null hypothesis with either ? = .05 or ? = .01. C) ?Fail to reject the null hypothesis with either ? = .05 or ? = .01. D) ?It cannot be answered without additional information.