Question

Of the two production methods, a company wants to identify the method with the smaller population mean completion time. One sample of workers is selected and each worker first uses one method and then uses the other method. The sampling procedure being used to collect completion time data is based on​
a.
​matched samples.

b.
​worker samples.

c.
​pooled samples.

d.
​independent samples.

Answer 1

Answer:

a) matched samples.

Step-by-step explanation:

Matched samples (also known as matched pairs, paired samples or dependent samples) are those samples which can be matched in pairs for one set of item and the sample data are not independent of each other. The pairs don’t have to be different people, it could be the same individuals at different time or tested on different activities for example

1. sampling the blood pressures of the same people before and after they receive a dose
2. the same people being measured when the group is given two different tests at different times