Question 1

(a) Describe the 90% confidence intervals for the average anxiety scores before and after COVID-19 pandemic. Interpret the meaning of 90% confidence. Based on the confidence intervals, discuss whether we can conclude that there was an increase in the anxiety level among the elderly.

(b) Apply an appropriate hypothesis test to determine if there was an increase in anxiety level for the elderly. Examine the assumptions required to perform the test. Are these assumptions reasonable? Please provide explanations.

Question 2

(a) Criticise the approach used in Question 1 by identifying three (3) statistical concerns. If you have a free hand to study this research question starting from data collection to analysis, explain how you would conduct the project. Keep your answer within three hundred words and indicate your word count at the end of your answer.

(b) Summarise your analysis in a simplified report for Mr Tan to address his concern. You may also use the result you have developed in your TMA. The word limit is three hundred words. Please indicate the word count at the end of your answer.

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