Read the article "A Better Cardiopulmonary Fitness Is Associated with Improved Concentration Level and Health-Related Quality of Life in Primary School Children":

https://docs.google.com/document/d/1Vk__aDzh5ezEG0ABLZtBg150JtnuNahH5tHQgWDhL2c/edit?usp=sharing

Kble, K.; Postler, T.; Oberhoffer-Fritz, R.; Schulz, T. A Better Cardiopulmonary Fitness Is Associated with Improved Concentration Level and Health-Related Quality of Life in Primary School Children. J. Clin. Med. 2022, 11, 1326. https://doi.org/ 10.3390/jcm11051326

Use the prompt questions below to answer to create an essay.

Prompt Questions:

1.Briefly describe (with your own words) the aim of the study presented in this paper.

2.Was this study an experiment or an observational study? How do you know?

3.Discuss how the sample was gathered. Indicate the country where the sample was gathered. Explicitly write the size of the total sample used in the analysis presented in the paper.

4.List all the ethical principles that the authors should have followed in this study, including anything special about this sample.

5.What statistical software was used in this study? What alpha level was used?

6.What is the dependent variable HRQOL? How was this variable measured?

7.Based on the results from Table 2, what variables were most significantly associated with the variable HRQOL?

8.What kind of bias did authors mention as a limitation in this study?

9.What is R square for the multiple regression model for HRQOL?