A researcher states an alternative hypothesis that the exercise improves physical health. Which is a possible null hypothesis corresponding to this alternative hypothesis?
A. Exercise worsens physical health.
B. There is no effect of exercise on physical health.
C. Physical health is not impacted by exercises.
D. Exercises worsens or has not impact on physical health.
Answer: D
You might also like to view...
Terms such as hope, will, competence, care, and wisdom are examples of
a. prime adaptive ego qualities b. psychosocial crises c. core pathologies d. central processes
Which of the following statements about age-related differences in Schaie's five primary abilities is true?
Only one of the abilities increases from ages 20 to 50. Cohort effects may have been the result of younger generations completing more education taught by educators who valued logic over facts. After age 35, there were moderate decreases in all of the abilities. Each successive cohort tended to score lower than previous generations in verbal memory and inductive reasoning but higher in number ability.
To be able to use the information about depth that is supplied by the cues of retinal disparity and convergence,
a. people must keep one eye closed. b. people must have two working eyes. c. the head must be moved slowly back and forth. d. objects must be farther than ten feet away.
Which of the following control strategies would be LEAST appropriate for older children and adolescents?
A) timeout B) loss of privileges C) grounding D) negotiation