The CEO of an international company with 50 regional offices is conducting an employee opinion survey among all employees. Thirty employees are selected randomly from each of the regional offices, the selected employees will complete the questionnaire posted online. The following questions are extracted from the questionnaire: Please provide your rating on the agree Agree Strongly disagree Strongly statement I & 2. Disagree 1. I am satisfied with my job. 2. The morale at the Company is good. 3. Working experience at the Company: (years) 4. Age: 29 years old or below 30 to 39 years old 40 to 49 years old 50 years old or above 5. Job nature: Sales Staff Technical Staff Administrative Staff Others (a) What sampling method is used in this study? (1 mark) (b) What is the population of this study? (I mark) (c) Which data collection method is used? (I mark) (d) What are the levels of measurement of the variables associating with questions 1, 3 and 5? (3 marks) (e) Suppose we make a change to questions I and 2 and the respondents will use a continuous quantitative rating ranging from 0 to 10 to indicate their agreement with the statements. A larger value in the response means a stronger agreement with the statement. What will be the level of measurement after the change? (1 mark) Determine whether the finding "75% of the respondents satisfied with their jobs" is using inferential or descriptive statistic. (1 mark) (g) If we adopt the rating method in (e), determine whether the mean rating of question 2 by all employees of the company is a parameter or statistics. (1 mark) (h) Is this study an observational study or experimental study? (1 mark)