Thanks to the outbreak of Covid-19, many educational institutes have transformed their course delivery from a face-to-face (F2F) mode to a virtual teaching mode. The operational processes in the F2F mode are different from those in the virtual teaching mode. For instance, instead of getting verbal feedback, instructors encouraged students to type in the Zoom chat tab to provide feedback. Dr. Goh is conducting online teaching for his students using Zoom. The course was delivered virtually over a six-week period, one lesson in each week. Dr. Goh encouraged students to participate in the Zoom session using chat tab. Dr. Goh would like to understand if the online participation can enhance students learning experience and their academic performance. Dr. Goh collected data to proceed with an analysis. He collected two variables, the total number of Zoom chat entries for each student over the six-week period, and the grades of students first assignment, which covers the topics in the first two weeks. For example, Student A001 has a total of 13 entries in the Zoom chat tab for the six weeks, and he/she receives 75 marks for his/her first assignment.

Student ID	Number of Chat Entry	Grades
A001	13	75
A002	16	69
A003	2	64
A004	23	73
A005	78	72
A006	98	55
A007	13	78
A008	27	88
A009	9	85
A010	4	64
A011	52	76
A012	19	73
A013	1	48
A014	27	70
A015	21	61
A016	8	68
A017	1	56
A018	10	49
A019	1	68
A020	4	63
A021	1	53
A022	34	79
A023	10	64
A024	67	63
A025	11	66

(a) Analyse the chat entry number and academic performance data. Provide a visualisation and a numerical description of the two variables according to the following requirements: (i) Select one (1) appropriate chart type to visualise and present data. Provide a brief justification of your choice. What observations and conclusions can you make from the data visualisation? (Word Count: Maximum 250 words) (10 marks)

(ii) Present descriptive statistics of the two variables. Provide a brief explanation of the key statistics. What can you observe and conclude from the descriptive statistics? Are these observations and conclusions consistent with those from (a)(i)? (Word Count: Maximum 200 words) (10 marks)