You are going to use a purposive sample (a nonprobability sample)to collect data from fast-food restaurant customers.Which of the following concepts would be applicable to determining sample size?
A)confidence intervals
B)sample size formula for estimating a percentage
C)sample size formula for estimating a mean
D)estimating a population value within a stated percent of allowable error
E)None of the above would be appropriate;sample size concepts and formulas are only applicable when probability sampling plans have been used.

Question

Quizplus · Accepted Answer

The concept of estimating a population value within a stated percent of allowable error would be applicable to determining sample size in a purposive sample. This is because in a purposive sample, the focus is on selecting specific individuals who possess certain characteristics or traits, rather than selecting individuals at random. Therefore, a sample size would need to be determined that would allow for an accurate estimate of the population value with a certain level of precision. Confidence intervals, sample size formulas for estimating a percentage or mean would not be appropriate for a nonprobability sample like a purposive sample.

You Are Going to Use a Purposive Sample (A Nonprobability