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Why are techniques like cluster sampling and multistage sampling just as externally valid as simple random sampling?

Match each cell organelle to its function.

Imagine you conduct a study and find that there is a significant positive relationship between employee motivation and job performance. You share the news with your colleague who responds: “I bet that the relationship between employee motivation and job performance is due to intelligence. In other words, the relationship between employee motivation and job performance will no longer be statistically significant after you control for intelligence.” In order to determine if your colleague is accurate, you collect data on these three variables (motivation, performance, and intelligence) in a new sample of participants. The results of the appropriate statistical analysis can be found below.    The three variables involved in this study are listed below. Next to each variable, indicate whether each variable is a predictor or criterion variable. Employee Motivation [color1] Job Performance [color2] Intelligence [color3] What statistical analysis was conducted to answer the question: “Does the relationship between employee motivation and job performance hold after controlling for intelligence”? [color4] Based on the results provided, was your colleague accurate? (Yes or No) [color5]

Under what circumstances might you expect barter to reemerge in an economy that has fiat money as a means of payment?

DR. CAROL SCENARIO: Dr. Carol conducts a study examining the relationship between exam performance, number of class absences, and amount of time spent studying in a large random sample. Below are her findings. Assume we are using .05 as our level of significance. Exam performance and number of class absences: r = −.67, p = .01 Exam performance and time spent studying: r = .31, p = .04 Number of class absences and time spent studying: r = .04, p = .66 In determining whether the relationship between two of Dr. Carol’s variables was statistically significant, which of the following must be considered?

Financial innovation has reduced individuals’ need to carry cash. Why?

Which of the following makes it more likely that behavioral observations will have good interrater reliability?

Our cell (80% water & 20% solutes) is placed in a hypertonic solution.Which way is the water going to go?

A type of lipid that makes up the plasma membrane of a cell is:

A threat to internal validity occurs only if a potential design confound varies ______ with the independent variable.