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Worksheet 24 A Closer Look at Sampling Worksheet 24 (continued) Riddle: How are minds like parachutes? 5. Suppose that you randomly draw 10% of the Democrats, then, separately, ran- DIRECTIONS: To find the answer to the riddle, write the answer to each question in domly draw 10% of the Republicans, and finally randomly draw 10% of all other the space immediately below it. In the solution section, the word in parentheses next registered voters from a population. Are you using simple random sampling, strat- ified random sampling, or cluster sampling? to the answer to the first question is the first word in the answer to the riddle, the word beside the answer to the second question is the second word, and so on. 6. Is the purpose of stratified random sampling, as described in this section, to pro- 1. Suppose that the size of a population is 50 and that the members of the population duce two or more samples to be compared? are numbered from 01 to 50. If you draw a sample starting at the beginning of the fifth row in Table 2 near the end of this book, what is the number of the second case drawn? 7. If you used cluster sampling and drew at random 30 clusters with 10 members each, is the sample size 30, 10, or 300? 2. Referring to the information in Question 1, what is the number of the third case drawn? 8. If you take a master list of all class sections being taught on a college campus and draw 50 sections at random, are you using simple random sampling, stratified ran- dom sampling, or cluster sampling? 3. Suppose that the size of a population is 352 and that its members are numbered from 001 to 352. If you draw a sample starting at the beginning of the first row in Table 2 near the end of this book, what is the number of the second case drawn? Solution section: 498 (lonely) no (they) same number (feeling) 30 (are) 10 (others) 4. Suppose that you want to use stratified random sampling to obtain a sample from a population in which there are 600 freshmen, 500 sophomores, 450 juniors, and cluster sampling (open) stratified random sampling (when) 58 (jumping) 400 seniors. Should you draw the same number or the same percentage from each 25 (they) 17 ( will) 300 (prophet) same percentage (function) 83 (run) grade level? multistage random sampling (he) 088 (only) simple random sampling (it)Table 2 Table of Random Numbers Row 16 24 15 9 8 0 8 100 8 1) 0 4 6 9 (2] 9 4 8 2 N ON 7 2 7 8 9 3 0 8 19 9 0 0 2 8 2 6 7 W N 4 3 1 1 2 0 7 6 OAN w J w 0 un loo - O- W W 7 2 4 4 00 0 O 0 0 HONNN w 7 4 Ow O W UN 5 ONO O 8 w 1 6 W ur 0 1 6 7 56 0O 3 W 3 4 0 6 4 4 6 7 6 OVA 4 8 1 5 5 0 5 U N N 6 9 7 1 4 N w VO 4 7 8 8 1 6 3 8 NO 8 4 6 1 8 1 2 4 1 4 Ow J 8 4 3 8 7 3 6 6 4 W 4 O - 5 5 6 6 7 4 3 5 W OO 8 6 9 9 0 5 17 2 2 3 2 5 5 6 9 4 9 3 8 18 2 3 5 0 5 3 8 5 4 5 wow 8 5 1 3 4 8 6 4 3 9 4 4 6 1 1 8 2 9 0 6 9 6 9 4 2 9 9 0 60 1 6 5 2 6 5 6 5 3 7 8 0 6 3 712 1 9 1 3 7 5 6 2 50 23 5 30 5 1 9 3 8 7 6 0 9 8 8 6 7 wa 24 7 2 4 0 9 1 UI 8 4 N 4 6 7 0 25 0 91 2 4 3 7 9 2 4 1 8 26 3 8 1