Bus105 Statistics|Confidence Intervals Assessment Answer

Question 1
Compare the life satisfaction of Singaporeans in 2002 and 2012 by presenting relevant descriptive statistics and graphs. Describe the measures of location and dispersion. Interpret your preliminary observations. 
Question 2
(a) Report the 99% confidence intervals for the average levels of life satisfaction of  Singaporeans in 2002 and 2012, respectively. Interpret these confidence intervals.
(b) Summarize your analysis to determine whether we can conclude that Singaporeans  are more or less satisfied with their lives now than before.
Question 3
Apply an appropriate test of hypotheses to determine if the Singaporeans were less satisfied  with life in 2012 than they were in 2002.  You should include the following:
(a) State the null and alternative hypotheses and explain how you develop these two  hypotheses.
(b) Execute the five-steps procedure for the hypothesis testing with α=0.01. Report the  relevant statistics you have used for this test.
(c) Discuss the assumptions you have made in performing the test. Are these assumptions  reasonable? Please provide explanations.
Question 4
If you have a free hand to study this research question starting from data collection to analysis,  demonstrate how you would conduct the project. Keep your answer within 500 words (indicate  your word count at the end of your answer).
Question 5
Develop a summary report to address the research question on "whether Singaporeans have  become more or less satisfied with their lives". The word limit is 500 words. Please indicate  the word count at the end of your answer.