一條數學 急用20分

the manager of a student canteen wants to collect the students opinion to improve
its service.

he sets up a sampling frame for 200 students and expects to select ten students for
the survey.

(a) which data collection method should be used?
(b)Suppose he uses simple random sampling with the starting point row 1 column 11
of the below random number table.
random number table
column
..........1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
Row.1.5 7 6 2 6 4 0 7 5 7 =1 =6 =1 =7 =2 =9 =0 =3 =1 =6
.......2.4 7 9 1 2 0 2 6 6 8 =3 =7 =2 =5 =7 =8 =3 =0 =7 = 0
.......3.6 8 5 8 3 9 1 2 2 6 =2 =1 =3 =1 =3 =4 =6 =5 =1 =3
.......4.3 4 1 4 2 1 2 3 7 4 =2 =1 =0 =6 =8 =1 =1 =0 =2 =2
.......5.0 1 1 6 3 2 1 1 3 7 =4 =2 =1 =0 =6 =8 =1 =1 =0 =2

個=係格開D數字
(i)which number will be selected first?
(ii)List the first five numbers to be selected.

(b)Suppose he uses systematic sampling with 012 as the starting point and
selects every 20th numbers.List the number that will be selected.
(c) in the sampling frame, there are 80 girls.if he uses stratified random sampling,
how many boys should be selected?