A researcher plans to conduct a research study comparing two treatment conditions with a total of 20 scores in each treatment.  Which of the following designs would require only 20 participants?

As standard deviation decreases what happens to standard error (SE)

A two-factor experiment with 6 levels of factor A and 8 levels of factor B would consist of ____ separate treatment conditions and the dfFactor A would be ____.

How many participants did I use in my study if I conducted a repeated measures t test and included t(50) in my interpretation?

A professor is using a new teaching method that is supposed to decrease his students’ exam scores. A one-tailed t-test was used. The critical value is 2.75 and the obtained value is 2.23. Which of the following is correct?

When can a z-test be used?

An advertising company would like to know which of two popular TV shows puts people in the best mood. Participants are randomly assigned to watch one of two TV shows and then completed a questionnaire that assesses mood. The TV shows and mood scores are The Office (M = 16) and Family Guy (M = 24). Higher scores indicate better moods. The ANOVA results are F(1, 149) = 3.42, p < .01. Based on these results, which conclusion is true?

The average number of hours spent watching Netflix per week in the United States is 20 hours. I randomly sample 10 people and find that my sample mean is 15 hours. What is the parameter?

The numerical value for a correlation ____.

A z-score distribution contains the properties of all EXCEPT: