please I need help in answering these questions( English or Arabic)

1- What is content analysis? And what are broad approaches taken to content analysis?

2- What is a variable? And what is an independent variable, dependent variable, mediator variable, moderator variable, and control variable?

3- What are the different types of research designs? And what is the difference between qualitative and quantitative designs?

4- What is the research methodology used in case studies? How do you make case study research designs reliable and valid?

5- What are ways for reducing problems with interviews and questionnaires? How can you avoid bias from preceding questions?

6- What is observation research? What are the main types of observation used in research design?

7- How do you assess the construct validity of a measure? How do you evaluate the new scale/measure in management?

8- There are two main types of sample; probability samples and purposive samples. How you can do a table who explain the difference between the two types?

9- Explain the meaning of the following in context of research design

a- Extraneous variables;

b- Confounded relationship

c- Research hypothesis

d- Treatment

10- Explain and illustrate the procedure of selecting a random sample.

11- Enumerate the different methods of collecting data. Which one is the most suitable for conducting enquiry regarding family welfare programme in Kurdistan region of Iraq?

12- Experimental method of research is not suitable in management field discuss what the problems in business organizations are?

13- What kind of minimum size would you need in sample used for statistical inference? What reason would you give for not exceeding a sample size of 1000?

14- What do you think would be your biggest challenge in conducting research interview? What could you do about this?

15- How can you improve the validity of your research?