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QUESTION 2 (nova) topic 4 An environmentalist wanted to determine if the mean acidity of rain differed among Ipoh, Johor Bahru and Kuantan. He randomly selected six rain dates at each city and obtained the following data: Pomel (XIJ^2 ( sampling to molis fu per 92 Ipoh 5.10 5.00 4.91 5.12 4.78 5.20 (xi) Table 2 Johor Bahru 4.80 4.15 4.42 4.65 4.87 4.10 Kuantar (x2 (132. 5.45 6.23 5.55 5.10 5.42 5.25 table. Comicon sup ·all stup ralent ры 78 ожираю elon Answer the following questions without using any output from any software. a) Construct a complete Analysis of Variance table. PG 89 b) At = 0.05, test whether the mean acidity of rain is different among the three spanje. cities. | H₁ Mifur AMD NO: ₁² M₂ Az 2 2 c) Based on the answer in (a) and (b), write a brief conclusion on the mean acidity of rain among Ipoh, Johor Bahru and Kuantan. P287

Part I QUESTION 1 COVID-19 virus has been categorized as a pandemic in March 2020 by the World Health Organization (WHO). A study was conducted through an online survey to describe the impact of the COVID-19 pandemic on the monthly spending on health supplement. A random sample of 11 respondents participated in the survey and the result is shown below: Respondent 1 2 3 4 5 6 7 8 9 10 11 Age (X₁) 24 35 27 23 45 56 72 38 29 42 48 Table 1 Before Pandemic (RM) 12 13 8 0 15 45 24 100 80 75 50 During pandemic (Y. ) (RM) 35 40 23 15 20 45 30 100 85 80 50 Answer the following questions without using any output from any software. a) Calculate the mean monthly spending different before and during COVID-19 pandemic. b) Calculate the standard deviation monthly spending different before and during COVID-19 pandemic. c) At (= 0.05, can you support the claim that the mean monthly spending on health supplement is higher during as compared to before COVID-19 pandemic? Assume the population variances are equal.

d) Calculate the Pearson correlation coefficient between age and monthly spending during COVID-19 pandemic and describe the relationship. e) Based on the answer in (c) and (d), write a brief conclusion on the monthly spending on health supplement.