What are the degree of freedom

Reference no: EM133643235

Problem: A professor is interested in examining how deep breathing can influence feeling of anxiety. She recruits participants in her class right before the final exam, when their feeling of anxiety would be high. She measures their current level of anxiety, instructed them to engage in 2 minutes of deep breathing, and then measures their anxiety again after they've completed the breathing. Below are the anxiety levels of each student before and after deep breathing. Your job is to determine if their anxiety levels significantly decrease after deep breathing. What's the null hypothesis for this research question? What the alternative hypothesis for this research question? What's the best statistical test to use to analyze this research question? The next step is to compute the test statistic. What is the t-statistic value (make sure you're using the t-test formula for the dependent sample t-test. What are the degree of freedom? Should you do a one-tailed or two-tailed test here? Think about whether the hypothesis is directional or non-directional? What is the critical value? Based on the t-value provided and the critical value, what is your decision about this research study?

Reference no: EM133643235

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