soullhkuspacehku. (Total: lmarks) JMrnl'Smrfm-w (a) John is asked to prepare the probability distribution Function of the number of customers (X) visiting a beauty salon during 8:00 9:00 pm in business days. The following table is prepared by John. .1. l 0 l 2 3 POI: = x] I]. 12 0.35 0.28 (I. I 4 0.02 There are two problems in the above probability distribulion function. Write down the two problems. (4 marks) State which test (z-test. ttest, ANOVA. :3 test) is most suitable for each of the following cases: (i) A social study is developed to compare the amount oftime (hours) three gmups ofstudeltls spent on playing online game in a week. The three groups of students come from public schools. government subsidized schools and private schools. Students from each youp are randomly selected to participate in the survey. (2 marks} A research is conducted to test it' elderly has a signicant reaction to a new developed treatment. The decrease in blood sugar at each participant is measured. The average decrease in blood sugar is used in the test. (2 marks} A study is conducted to investigate the hygiene status during COVID-l9. Referring to the following two variables, write elem if Ihe variable be quantitative (discrete). quantitative (continuous). or qualitative. [i] The number of times you used hand sanitizer or hand cleansing gel during your last trip by public transport. (I mark) (ii) When you back home after work. how long (in. seconds} would you wash your hand. (I mark) (Total: IDmarks) END OF PAPER [Windham-Jr