Before Deep Breathing After Deep Breathing

15 12

18 16

19 14

15 10

14 10

13 9

10 4

6 3

4 1

9 1

Question 1

1pts

What's the null hypothesis for this research question?

A. Ha: Anxiety levels are significantly lower after deep breathing

B. Ho: Anxiety levels are the same before and after deep breathing

Question 2

1pts

What's the alternative hypothesis for this research question?

Group of answer choices

A. Ho: Anxiety levels are the same before and after deep breathing

B. Ha: Anxiety levels are significantly lower after deep breathing

Question 3

1pts

What's the best statistical test to use to analyze this research question?

Group of answer choices

A. Correlation coefficient

B. One way ANOVA

C. Independent sample t-test

D. One sample z-test

E. F statistic

F. Dependent samples t-test

The next step is to compute the test statistic. Here's where I'm going to help you out. I'm going to give you the t-value here:

Question 4

1pts

Now, you tell me: what are the degrees of freedom?

Question 5

1pts

Should a one-tailed or two-tailed test here? Think about whether the hypothesis is directional or non-directional!

Group of answer choices

two tailed

one tailed

Question 6

1pts

What is the critical value?

Question 7

1pts

Based on the t-value provided and the critical value, what is your decision about this research study?

Group of answer choices

There is not a significant decrease in anxiety before and after deep breathing.

There is a significant decrease in anxiety after deep breathing

Question 8

1pts

Explain when you would you use a dependent samplest-Test rather than an independent samplet-Test? What are the benefits and problems with each design? Be specific!

For the next two questions, you're going to design a study that uses a dependent samplest-Test design and a study that uses an independent samplest-Test. Be sure to base your two studies on the same general topic (in other words, apply the same research question to a study where you would use an independent samples t-test design and a study where you would use a dependent samples t test design).

Question 9

1pts

What's your independent samples t-test study? Tell me your IV and how you would manipulate the IV, and your DV. This needs to be your own original study idea.

Question 10

1pts

What's your dependent samples t-test study? Tell me your IV and how you would manipulate the IV, and your DV. This needs to be your own original study idea (and it needs to be the same general topic as your independent samples t-test study).