1. A ____ test, reflecting a nondirectional hypothesis is two tailed test
Answer
Correct Answer:
Non directional
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2. A ____test, reflecting a directional hypothesis is one tailed test
Answer
Correct Answer:
Directional
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3. A research hypothesis that posits a difference between groups in one direction is called
Answer
Correct Answer:
Directional
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4. A research hypothesis that posits a difference between groups but not in either direction is known as
Answer
Correct Answer:
Nondirectional
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5. A statement of inequality between two variables is called
Answer
Correct Answer:
Research
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6. A statement of equality between sets of variables is called
Answer
Correct Answer:
Null
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7. The difference between sample and population values is sampling error
Answer
Correct Answer:
True
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8. An if–then statement of conjecture that relates variables to one another and is used to reflect the general problem statement is hypothesis
Answer
Correct Answer:
True
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9. ______ statistics are used in the process of hypothesis testing.
Answer
Correct Answer:
Inferential
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10. Given that on one section of the SAT the mean is 500 and the standard deviation is 100, what is the approximate probability of a student scoring 300 or higher on the test?
Answer
Correct Answer:
0.98
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11. In a study of the effects of exercise on stress, researchers predict simply that there will be a difference in stress level between the exercise and no-exercise groups. The researchers are using a ______ hypothesis.
Answer
Correct Answer:
Two-tailed
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12. When using a ______ hypothesis, the researcher predicts the direction of the expected difference between the groups.
Answer
Correct Answer:
One-tailed
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13. H0 is to Ha as ______ hypothesis is to ______ hypothesis.
Answer
Correct Answer:
Null; alternative
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14. A directional hypothesis is also known as a ______ hypothesis and a nondirectional hypothesis is also known as a ______ hypothesis.
Answer
Correct Answer:
One-tailed; two-tailed
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15. Which of the following is an example of a nondirectional hypothesis?
Answer
Correct Answer:
There is a relationship between exercise and increased heart rate.
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16. Given that on one section of the SAT the mean is 500 and the standard deviation is 100, what is the approximate probability of a student scoring 300 or lower or 700 or higher on the test?
Answer
Correct Answer:
0.045
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17. Given that on one section of the SAT the mean is 500 and the standard deviation is 100, what is the approximate probability of a student scoring 700 or higher on the test?
Answer
Correct Answer:
0.02
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18. When using a ______ hypothesis, the researcher predicts that the groups being compared will differ, but does NOT predict how they will differ.
Answer
Correct Answer:
Two-tailed
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19. Inferential statistics allow us to ______.
Answer
Correct Answer:
Infer something about the population based on the sample
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20. Concluding there is no effect of the independent variable is to the ______ hypothesis, as concluding there is an effect of the independent variable is to the ______ hypothesis.
Answer
Correct Answer:
Null; alternative
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21. Given that on one section of the SAT the mean is 500 and the standard deviation is 100, what is the approximate probability of a student scoring 400 or lower or 700 or higher on the test?
Answer
Correct Answer:
0.18
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22. In a study on the effects of the amount of sleep on driving performance, researchers predict that those in the group that is allowed more sleep will exhibit better driving performance. The researchers are using a ______ hypothesis.
Answer
Correct Answer:
One-tailed and directional
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23. One- and two-tailed hypotheses are both types of ______ hypotheses.
Answer
Correct Answer:
Alternative
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