1. Region of acceptance is area of sampling distribution generally defined by the mean +/–2 SD or 95% of the distribution; results falling in this region imply that our sample belongs to the sampling distribution defined by the H0 and result in the researcher retaining the H0.
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Correct Answer:
True
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2. Cohen’s d is often used when examining ______ because it is in standard deviation units.
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Correct Answer:
Means
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3. When we find statistical significance it suggests that our results were ______.
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Correct Answer:
Not due to chance alone and do not belong to the sampling distribution defined by the null hypothesis
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4. The sampling distribution is defined by the ______.
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Correct Answer:
Null hypothesis
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5. ______ and ______ are effect sizes.
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Cohen’s d; proportion of variability accounted for
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6. The effect size is a measure of the ______.
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Strength or magnitude of a relationship or difference
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7. The difference between one-tailed and two-tailed hypotheses is ______.
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Correct Answer:
A one-tailed hypothesis predicts the direction of the difference and a two-tailed hypothesis does not.
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8. If you reject the null hypothesis at p < .02, the probability of a Type I error is ______ and the probability of a Type II error is ______.
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Correct Answer:
2%; zero
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9. Inferential statistics refer to statistics used to ______.
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Correct Answer:
Analyze data from a sample to draw conclusions about a population from which the sample was drawn
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10. A confidence interval tells you ______.
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Correct Answer:
The margin of error of your results
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11. In the hypothesis testing process, the researcher first ______.
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Correct Answer:
States the null and alternative hypotheses
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12. A measure of effect size; describes the mag-nitude of the effect of our IV (or predictor) on the DV (or outcome) in standard deviation units is cohen's d
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Correct Answer:
True
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13. Chi square goodness of fit is a nonparametric test used with one nominal variable having two or more categories; tests whether the observed frequencies of the categories reflect the expected population frequencies.
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Correct Answer:
True
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14. The variability among the scores of participants created by individual or participant differences even under the same conditions is called within group variance
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Correct Answer:
True
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15. The probability of incorrectly retaining a false H0 is type ___ error
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Correct Answer:
II
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16. The probability of the significance level of your findings is called type ___ error
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Correct Answer:
I
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17. A hypothesis stating that results from a sample will differ from the population or another group but without stating how the results will differ is called ___ tailed hypothesis
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Correct Answer:
Two
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18. Statistical significance is when the results of a study fall in the extreme ____% of the sampling distribution, suggesting that the obtained findings are not due to chance alone and do not belong to the sampling distribution defined by the H0.
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Correct Answer:
5
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19. Population standard deviation is called
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Correct Answer:
Sigma
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20. The ability of a measurement instrument to detect differences is called sensitivity
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Correct Answer:
True
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21. A distribution of some statistic obtained from multiple samples of the same size drawn from the same population is called Sampling distribution
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Correct Answer:
True
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22. Region of rejection is the extreme ____(generally) of a sampling distribution; results falling in this area imply that our sample does not belong to the sampling distribution defined by the H0and result in the researcher rejecting the H0and accepting the Ha
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Correct Answer:
5%
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23. The usefulness or everyday impact of results is practical significance
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Correct Answer:
True
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24. The ability to reject the null hypothesis when it is, in fact, false is called
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Correct Answer:
Power
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25. Statistics from a population is parameters
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Correct Answer:
True
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26. A hypothesis stating the direc-tion (higher or lower) in which a sample statistic will differ from the population or another group is ___ tailed hypothesis
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Correct Answer:
One
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27. A prediction of no difference between groups; the hypothesis the researcher expects to reject is called ___ hypothesis
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Null
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28. Population mean is represented by
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Mu
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29. ____ statistical analysis of data gath-ered from a sample to draw conclusions about a population from which the sample is drawn.
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Correct Answer:
Inferential
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30. The process of determining the probability of obtaining a particular result or set of results is hypothesis testing
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Correct Answer:
True
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31. An alternative hypoth-esis used in experiments and stated in terms of differences between groups is called experimental hypothesis
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Correct Answer:
True
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32. Strength or magnitude of the effect of a variable, or the strength of the relationship between ___ variables is effect size
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Correct Answer:
Two
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33. The value of a statistic that defines the extreme 5% of a distribution for a one-tailed hypothesis or the extreme 2.5% of the distribution for a two-tailed test is called
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Correct Answer:
Critical value
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34. The percentage of a sampling distri-bution that the researcher selects for the region of rejec-tion; typically researchers use 5% (p < .05) is called criterion level
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Correct Answer:
True
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35. An estimation of the range of values within which the scores will fall (margin of error) is confidence interval
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Correct Answer:
True
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36. Alternative hypothesis is a prediction of what the researcher expects to find in a study. Often called an “experimental hypothesis” in experimental research and stated in terms of differences between groups.
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Correct Answer:
True
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Research Methods (Statistics And Applications) MCQs | Topic-wise
