The DASS-21 questionnaire is a validated measure of depression, anxiety, and stress. For the general population, the mean for anxiety is = 4.3. Anxiety levels are calculated based on self-reported answers to questions on a scale from 0 through 42, with lower scores indicating lower anxiety.

Participants with gastrointestinal issues (specifically inflammatory bowel disease, IBD) completed the DASS-21. Use the data presented below to determine whether having gastrointestinal issues like IBD significantly increases risk for anxiety. Test whether or not the performance of this sample is significantly higher than the normal population using the proper t-test.Here are the data:

Anxiety scores: 4, 13, 6, 8, 4, 5, 9, 13, 4, 6

1a. Identify the Indep. Variable:__

b. Dep. Variable:__

c. Is it the Hypothesis one-tailed or two-tailed?__

d. Proper t-test statistic:__Why? _

2. State Hypotheses mathematically: H₀:__H₁:__

State Hypotheses in words