Question 1 (a) (b) (C) (d) (6) Describe the 90% condence interval for the average electricity bill in a household in May 2020. Interpret the meaning of the 90% condence. Discuss whether he can conclude that the average monthly electricity bill in a household during the Covid-19 pandemic is $5 greater than that before the Covid-19. (15 marks) Discuss whether your conclusion will change if you use a 99.99% condence interval and the number of data is a quarter of the original data set. Explain your findings. How reliable is your conclusion in 1(a)? (15 marks) Apply an appropriate hypothesis test to determine if the average monthly electricity bill in a household during the Covid19 pandemic is $5 greater than that before the Covid 19 pandemic. (15 marks) Criticise the analysis used by Mr. Tan 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 would you conduct the project? Keep your answer within 300 words and indicate your word count at the end of your answer. (35 marks) Summarise the above analysis in a simplied report for Mr. Tan. You may also use the result you have developed in your TMA. The word limit is 300 words. Please indicate the word count at the end of your answer. (20 marks) ---- END OF ASSIGNMENT