# Random Sampling Question

• MHB
• MysticGarC

#### MysticGarC

okay guys this is the question:

A zoo has 80 cotton-top tamarins. Describe in detail how the random- number table given below could be used to select a sample of 5 of them, for a study of tail lengths.
8330 3992 1840 0330 1290 3237 9165 4815 0766
(5marks)

So I am not really sure where to go with this one, i can't see it being any type of systematic so it must be simple random sampling, but the issue is, there are nine groups of four numbers and I can't see a way to get these 36 numbers to relate back to the 80 tamarins.
Any help appreciated.

First assign numbers 1 to 80 to the 80 tamarinds.

You have 9 sets of 4 digit number:
8330 3992 1840 0330 1290 3237 9165 4815 0766

Break them into 18 groups of 2 digit numbers.
83 30 39 92 18 40 03 30 12 90 32 37 91 65 48 15 07 66

Drop any of those larger than 80.
30 39 18 40 03 30 12 32 37 65 48 15 07 66
Choose 5 of those in some way that preserves the randomness.
One way would be to choose tamarinds numbered 30, 39, 19, 40, and 03.