A variable always has

A ___________ error refers to finding an effect when there really is no effect while a __________ error refers to not finding an effect when there really is an effect

Which of the following is a common method for controlling experimenter effects on the participants? (Select all that apply)

Janet conducts a study on social loafing (letting other group members do most of the work). Similar to a prior research study she read about, she alters whether the student participant is alone or in a group. However, she adds a new dimension: whether the students in the group know or do not know each other. She finds that students by themselves worked harder than students in groups. In addition, she found that social loafing is lessened if the students in the group know each other as opposed to if they are strangers. Janet’s study represents

Now, pretend you actually ran the study you came up with. Make up the results (the test statistic values, means and SDs), and write up the results as you would see them in an APA style research paper. Note, you do not actually have to do any calculations here! You just need to make up the means and sds for each group, the test statistic value, and the p value and write out the results. You can use the answers to the write up questions on the previous 4 assignments as a template for this! 

Is there a significant difference between the different groups on the dependent variable? Explain how you came to this conclusion. 

Many cells that reach the pre-B-cell stage succeed in generating progeny that have intact IgM molecules and can be classified as immature B cells. What can this success be attributed to?

Toxins of CD8 T cells have no effect on healthy human tissues

Choisissez le sujet que vous voulez développer. Choisissez le bon type de texte pour cette tâche. Écrivez 450-600 mots, sur une feuille de papier. Aucune ressource n’est permise. Lorsque vous avez terminé, veuillez soumettre une photo (ou un scan) de votre travail ici. 

Which of the following does not require activation by T cells?