When comparing two independent samples with continuous outcomes, an investigator would compare the proportions in each category of the study. True O False

only parts D, E, & F

We often describe our emotional reaction to social rejection as “pain.” A clever study asked whether social rejection causes activity in areas of the brain that are known to be activated by physical pain. If it does, we really do experience social and physical pain in similar ways. Subjects were first included and then deliberately excluded from a social activity while changes in brain activity were measured. After each activity, the subjects filled out questionnaires that assessed how excluded they felt. Here are data for 13 subjects. The explanatory variable is “social distress” measured by each subject’s questionnaire score after exclusion relative to the score after inclusion. (So values greater than 1 show the degree of distress caused by exclusion.) The response variable is change in activity in a region of the brain that is activated by physical pain. create a scatterplot

Calculate the relevant test statistic. Round your answer to two decimal places. t-statistic = i Find the p-value. Round your answer to three decimal places. p-value = i

In tests of proportions, the data is qualitative. True False

Which statistical method would be most effective to determine if the average size of dogs in Europe was different than the average size of dogs in the U.S.?  Why?

You are interested in evaluating how well students perform on an attention test. There are two conditions (low noise & high noise) and to reduce your sample size, you have each subject participate in both conditions. Which stats test should you use to analyze the data? a. Paired-samples t test. b. Two-factor between-subjects ANOVA c. Chi-square Goodness of Fit d. Bivariate correlation

Explain Multivariate Relationships among Items?

In a study examining the relation of math ability to the belief that math ability was innate, the belief was considered the predictor variable. The researcher hopes to find a correlation between the participants’ math ability and their belief that math ability is innate.  The scores for the three participants are shown below.   The group that believed that math is NOT innate scored 66, 70, 50.   The group that believed that math IS innate scored 7, 4,10.                               what are the mean and SD for each group?

In a test of significance, you can conclude there is a statistically significant relationship when: