please help this statistics questions with clear steps and details, thank you so much

lal ll it) Due to the impact of the novel Coronavirus, a large number of extracurricular activities in primary schools were cancelled. The principal of Primary School ICE was interested in estimating the mean hour per week spent on exercises of all the students in Primary School ICE. The principal randomly selected 10 classes in Primary School ICE and invited all the students in the selected classes to compiete an online survey. ii} Identify the population. [1 mark} {ii} Identify the parameter. (1 mark} {iii} Which sampling method was used in the study? {1 mark} {iv} At the end of the survey, the principal reported that the students who joined the online survey spent an average of 2.5 hours per week on exercises. Determine whether the principal was using dgcriivg statigics or inferential statiics in his statement. {1 mark) Determine if the following variables are new or 9mm and state their w W. Wrong spelling will get marks deducted. ii} Time {in hours} spent on exercises on a randomly selected day {1 mark} (ii) Rate the variety of sport facilities at Primary School ICE. [Not enough I Enough I More than enough) [1 mark} {iii} Brand name of sport equipment [1 mark} {iv} Number of pairs of sport shoes purchased in Year 2021 [1 mark} Determine if the following cases are W or gamemew. Wrong spelling will get marks deducted. {i} Among 100 randomly selected persons participated in the Hong Kong COVID-IQ vaccination programme last week, 29 of them were over 45 years old and the remaining were less than or equal to 45 years old. Most of them are involved in catering businesses. (1 mark} {ii} In a job recruitment. all applicants are required to attend a written test. Applicants were randomly divided into two groups. Applicants in the rst group were arranged to attend an online test. whereas applicants in the other group were requested to write the written test in a test center. The written test performances of these two groups of applicants were compared and studied. [1 mark}