1. A researcher wants to evaluate the learning ability of college students with various background sounds during learning. She randomly divides 21 participants into three groups. All students study a passage of text for 30 minutes. Those in group 1 study with background sound at a constant volume in the background. Those in group 2 study with background sound that changes volume randomly. Those in group 3 study with no sound at all. After studying, all students take a 10-point multiple choice test about the material. Their scores follow:

Constant sound Random sound No sound

7 5 5

4 5 6

6 3 7

8 4 9

6 4 8

6 6 7

9 2 6

a)What kind of test would you need to run?

b)What is the independent variable (or factor)?

c)What is the dependent variable?

d)What is the statistical notation (for some types of tests, this answer should include the post-hoc notations AS WELL as the overall statistical notation)?

e)Is the test significant? How do you know? (for some types of tests, this answer should include the post-hoc significance AS WELL as the overall significance)

f)What are the means that should be reported (If this is an ANOVA/factorial please include all means to be reported)?

g)What is the complete interpretation (in order to receive full credit you need to include all statistical notation as well as an interpretation of what they mean in context)