1) A researcher is interested in the average extraversion level of librarians. In reality, the sample consists of 50 introverts who score extremely low on the extraversion scale and one extremely extraverted actor (who is researching how to play a librarian for an upcoming film). Which of the following measures of central tendency will be problematic in this context? why?a) the mean; it is distorted by the presence of outliersb) the median; it is distorted by the presence of outliersc) the mean; this sample has a restricted ranged) the median; this sample has a restricted range2) which of the following is the “signal” used to calculate the t value in a t-test (as opposed to the “noise”)?a. The difference between the two conditions on the dependent measureb. The degree to which two interval variables are correlated with one anotherc. The overall variation between three or more conditions on the dependent measured. Random variation in the dependent measure within each condition3) Which of the following is the ânoiseâ used to calculate the t value in a t-test?e. The degree to which two interval variables are correlated with one anotherf. Random variation in the dependent measure within each conditiong. The overall variation between three or more conditions on the dependent measureh. The difference between the two conditions on the dependent measure4) Dr. Bem finds that there is a positive correlation between sensation-seeking and the ability to predict the future. In reality, there is no such correlation. This isâ¦i. A Type 1 errorj. A Type 2 errork. The result of low statistical powerl. Not an error at all5) What does the p value represent?a. The probability of the observed results being obtained by chance, assuming the null hypothesis is true.b. The probability of the observed results being obtained by chance, assuming the null hypothesis is false.c. The correlation between the independent and dependent variabled. The correlation between the independent variable and the confound6) An independent samples t-test is used to determine ifâ¦12. 2 groups are significantly different from each other13. 2 within-subject conditions are significantly different from each other14. 3 or more groups are significantly different from each other.15. 2 interval variables are positively, negatively, or uncorrelated with each other7)A pairedsamples t-test is used to determine ifâ¦.a. 2 groups are significantly different from each otherb. 2 within-subject conditions are significantly different from each otherc. 3 or more groups are significantly different from each other.d. 2 interval variables are positively, negatively, or uncorrelated with each other
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