Descriptive Statistics and Assignment Descriptive Statistics and Assignment
Descriptive Statistics and Assignment
Descriptive Statistics and Assignment
Permalink: https://collepals.com/descriptive-stat…s-and-assignment/
Descriptive Statistics and Mean-Level Comparisons Assignment
- Barker and colleagues (2012) compared 61 parents fo children who had a serious mental illness (SMI) to 321 parents of children withour such an illness. The researchers examined the parents’ reported levels of stress, their levels of a hormone called cortisol (levels of this hormone provide an indication of chronic stress), and their use of several types of medication. The table below shows the results of the study. Focusing on the parents’ number of stressors (the first row of the table) and the parents’ use of medications for anxiety or depression (the last row in the table), explain these results to a person who knows about the t test for a single sample but is unfamiliar with the t test for independent means.
| Descriptive Statistics and Mean-Level Comparisons | |||||||||
| SMI Parents | Comparison Parents | ||||||||
| N = 61 | N = 321 | ||||||||
| Mean | SD | Mean | SD | t | p | ||||
| Stress | |||||||||
| Number of stressors | 0.65 | 0.56 | 0.42 | 0.37 | -3.08 | 0.00 | |||
| Stress severity sum | 1.89 | 1.63 | 1.16 | 1.1 | -3.3 | 0.00 | |||
| Cortisol (nmol/L) | |||||||||
| Wake | 17.46 | 10.72 | 16.75 | 7.38 | -0.14 | 0.90 | |||
| Out of bed | 22.83 | 11.48 | 24.19 | 10.59 | 1.13 | 0.26 | |||
| Bed | 5.72 | 8.56 | 4.22 | 5.57 | -1.86 | 0.06 | |||
| Cortisol awakening response | 5.62 | 9.7 | 7.48 | 8.34 | 1.55 | 0.12 | |||
| Decline from out of bed | 17.13 | 11.35 | 20.11 | 10.71 | 1.97 | 0.05 | |||
| Medication use (proportion) | |||||||||
| Allergy | 0.26 | 0.44 | 0.16 | 0.37 | -1.71 | 0.09 | |||
| Steroid | 0.2 | 0.4 | 0.12 | 0.33 | -1.32 | 0.19 | |||
| Hormone | 0.13 | 0.34 | 0.14 | 0.35 | 0.25 | 0.80 | |||
| Anxiety or depression | 0.26 | 0.44 | 0.12 | 0.33 | -2.36 | 0.02 | |||
14. For each of the following studies, say whether you would use a t test for dependent means or a t test for independent means.
a. A researcher measures the heights of 40 university students who are the firstborn in their families and compares the 15 who come from large families to the 25 who come from smaller families.
b. A researcher tests performance on a math skills test of each of 250 individuals before and after they complete a one-day seminar on managing test anxiety.
c. A researcher compares the resting heart rate of 15 individuals who have been taking a particular drug to the resting heart rate of 48 other individuals who have not been taking the drug.
Collepals.com Plagiarism Free Papers
Are you looking for custom essay writing service or even dissertation writing services? Just request for our write my paper service, and we'll match you with the best essay writer in your subject! With an exceptional team of professional academic experts in a wide range of subjects, we can guarantee you an unrivaled quality of custom-written papers.
Get ZERO PLAGIARISM, HUMAN WRITTEN ESSAYS
Why Hire Collepals.com writers to do your paper?
Quality- We are experienced and have access to ample research materials.
We write plagiarism Free Content
Confidential- We never share or sell your personal information to third parties.
Support-Chat with us today! We are always waiting to answer all your questions.
