Question

A clinical psychologist is the primary therapist for 12 patients. She randomly selects a sample of 3 patients to be in her study. How many different samples of this size can be selected from this population of 12 patients using theoretical sampling and experimental sampling?

(a) theoretical sampling

samples


(b) experimental sampling

samples

Answer 1

a)
`X=1728`

b)
`X'=220`

Explanation:

From the question we are told that

Population size N=12

Sample size n=3

a)Generally using theoretical sampling we can solve mathematically

`X=N^n`

`X=12^3`

`X=1728`

b)Generally using experimental sampling we can solve mathematically

`X'=^NC_n`

`X'=^1^2C_3`

`X'=220`