# stats-Match the following research designs to the appropriate inferential statistics done june 2015

1. (Matching)Match the following research designs to the appropriate inferential statisticA. ANOVAB. Chi-SquareC. t-testD. correlation1IV: categorical with 4 levels; DV: categorical with 2 levels2 IV: categorical with 2 levels; DV: continuous3 IV: continuous; DV: continuous4 IV: categorical with 4 levels; DV: continuous2 (Short Answer)Suppose a researcher comes up with a new drug that she thinks cures cancer. She assigns some patients to receive a placebo, and others to receive the new drug. The null hypothesis is that the drug will have no effect.a. In this case, what would be the Type I error?b. In this case, what would be the Type II error?c. What would be a “hit”?d. What would be a “true negative”?e. In this scenario, explain the consequences of a Type I error. How would this error be detected?3 (Multiple Choice)When it comes to the ___, we are only concerned about the absolute value. The positive / negative sign doesn’t matter. However, when considering the ____, the sign is a vital piece of information about the nature of the relationship.A. t-test; correlation coefficient (r)B. correlation coefficient (r); t-test4 (Multiple Choice)A researcher tested 23 older adults and 23 younger adults on their ability to remember a list of words. This is a ____ design.A. between-subjectsB. within-subjectsC. factorial5Accepted characters: numbers, decimal point markers (period or comma), sign indicators (-), spaces (e.g., as thousands separator, 5 000) A researcher tested 23 older adults and 23 younger adults on their ability to remember a list of words. What are the degrees of freedom? __6(Multiple Choice)A researcher tested 23 older adults and 23 younger adults on their ability to remember a list of words.The research hypothesis is that the younger adults will perform better on this task than the older adults.This hypothesis isA. directional / one-sidedB. non-directional / two-sided7 (Short Answer)A researcher tested 23 older adults and 23 younger adults on their ability to remember a list of words.Will the researcher be able to determine causation (Yes/No)? Explain your answer in one sentence.8 (Multiple Choice)Suppose the researcher found that the younger adults remembered a mean of 36 words (sd=1.2) and the older adults remembered a mean of 30 words (sd=2.7).Suppose the calculated t is 2.613What is the most precise level of significance for this result?A. p<.1B. p<.05C. p<.025D. p<.02E. p<.01F. p<.005G. p>.059 (Multiple Choice)For the question above, is the result statistically significant?A. Yes, the difference is statistically significantB. No, the difference is not statistically significant.10 (Short answer)Write the interpretation above.Be sure to include a statement about the significance in terms of the null hypothesis, the names of both variables, the means for both levels, the t-statistic written out in APA format and plainly state the interpretation of any difference.11 (Multiple Choice)Once again, the researchers predicted that the younger adults would remember more words than the young adults. Suppose the researcher found that the younger adults remembered a mean of 32 words (sd=1.2) and the older adults remembered a mean of 30 (sd=2.7) words.Suppose the calculated t is 1.655What is the most precise level of significance for this result?A. p<.1B. p<.05C. p<.025D. p<.02E. p<.01F. p<.005G. p>.0512 (Multiple Choice)For the question above, is the result statistically significant?A. Yes, the difference is statistically significant.B. No, the difference is not statistically significant.13. (Short answer)Write the interpretation above.Be sure to include a statement about the significance in terms of the null hypothesis, the names of both variables, the means for both levels, the t-statistic written out in APA format and plainly state the interpretation of any difference.14.G. Suppose the researcher conducted a further study, but this time measured age continuously and calculated a correlation between age and memory performance. In this new study, the researcher recruited a total of 55 participantsThe research hypothesis is that the younger adults will perform better on this task than the older adults.For this example, what are the degrees of freedom?__15. (Multiple Choice)G1. Suppose the researcher calculated a correlation of r = -0.24 between age and memory performance. Use the tables of critical values provided in the resources (also attached here).What is the most precise level of significance for this result?A. p<.1B. p<.05C. p<.025D. p<.01E. p<.005F. p>.0516. (Multiple Choice)G2. Did the researchers find a significant positive or negative relationship? Or was there no significant relationship?A. positive, significantB. negative, significantC. zero, not significant17. (short answer)G3. Write the interpretation.Be sure to include a statement about the significance in terms of the null hypothesis, the names of both variables, the direction of the correlation, the statistic written out in APA format and plainly state the interpretation.18. (Multiple Choice)H. Suppose the researcher conducted a further study, but this time measured age continuously and calculated a correlation between age and memory performance. In this new study, the researcher recruited a total of 40 participantsThe research hypothesis is that the younger adults will perform better on this task than the older adults.Use the tables of critical values provided in the ResourcesSuppose the researcher calculated a correlation of -0.395 between age and memory performance.What is the most precise level of significance for this result?A. p<.1B. p<.05C. p<.025D. p<.01E. p<.005F. p>.0519 (Multiple Choice)H1. Did the researchers find a significant positive or negative relationship? Or was there no significant relationship?A. positive, significantB. negative, significantC. zero, not significant20. (Short answer)H2. Write the interpretation.Be sure to include a statement about the significance in terms of the null hypothesis, the names of both variables, the direction of the correlation, the statistic written out in APA format and plainly state the interpretation.21. (Multiple Choice)I. Suppose the researcher conducted a further study, but this time measured age continuously and calculated a correlation between age and memory performance. In this new study, the researcher recruited a total of 55 participantsThe research hypothesis is that the younger adults will perform better on this task than the older adults.Use the tables of critical values provided in Resources.Suppose the researcher calculated a correlation of r = -0.04 between age and memory performance.What is the most precise level of significance for this result?A. p<.1B. p<.05C. p<.025D. p<.01E. p<.005F. p>.0522. (Multiple Choice)I1. Did the researchers find a significant positive or negative relationship? Or was there no significant relationship?A. positive, significantB. negative, significantC. zero, not significant23. (Short answer)I2. Write the interpretation. Be sure to include a statement about the significance in terms of the null hypothesis, the names of both variables, the direction of the correlation, the statistic written out in APA format and plainly state the interpretation.

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