The DASS-21 questionnaire is a validated measure of depression, anxiety, and stress. For the general population, the mean for anxiety is µ = 4.2. 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: 12, 15, 10, 8, 10, 5, 10, 13, 4, 6 ANALYSES AND UNGRADED OPTIONAL GUIDING QUESTIONS: 1a. Identify the Indep.Variable:__ Dep.Variable:__ Is it the Hypothesis one-tailed or two-tailed?__ Proper t-test statistic:__ Why? _ State Hypotheses mathematically: H0:__ H1:__ State Hypotheses in words. H0: __ H1: _ Conclusions Did your data pass your assumptions check(s)? (Did you fail to reject the null for normality and/or equality of variance tests?) ______ What is your t? _____ What is your df? ____ What is your p-value? _____ Did you find a significant difference/ reject the null? _
Correlation
Correlation defines a relationship between two independent variables. It tells the degree to which variables move in relation to each other. When two sets of data are related to each other, there is a correlation between them.
Linear Correlation
A correlation is used to determine the relationships between numerical and categorical variables. In other words, it is an indicator of how things are connected to one another. The correlation analysis is the study of how variables are related.
Regression Analysis
Regression analysis is a statistical method in which it estimates the relationship between a dependent variable and one or more independent variable. In simple terms dependent variable is called as outcome variable and independent variable is called as predictors. Regression analysis is one of the methods to find the trends in data. The independent variable used in Regression analysis is named Predictor variable. It offers data of an associated dependent variable regarding a particular outcome.
The DASS-21 questionnaire is a validated measure of depression, anxiety, and stress. For the general population, the mean for anxiety is µ = 4.2. 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: 12, 15, 10, 8, 10, 5, 10, 13, 4, 6
ANALYSES AND UNGRADED OPTIONAL GUIDING QUESTIONS:
1a. Identify the Indep.Variable:__
- Dep.Variable:__
- Is it the Hypothesis one-tailed or two-tailed?__
- Proper t-test statistic:__ Why? _
- State Hypotheses mathematically: H0:__ H1:__
State Hypotheses in words. H0: __ H1: _
- Conclusions
Did your data pass your assumptions check(s)? (Did you fail to reject the null for normality and/or equality of variance tests?) ______
What is your t? _____
What is your df? ____
What is your p-value? _____
Did you find a significant difference/ reject the null? _
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