1.To determine the percentage of defective items in a batch at a major producing company, the quality control department may use any of the five following sampling techniques.Match each technique with the sampling term from the list below that most closely defines that technique.Each sampling term corresponds to one and only one technique.

Techniques:

1.All batches in a given month are stored. The number of defective items is counted in randomly selected batches.

2.The first 10 batches are taken and the number of defective items counted.

3.The batches made in a month are grouped into which shift they are made.The number of defective items is counted in randomly selected batches in each shift.

4.A random number n is determined and every nth batch off the line is taken and the number of defective items in each chosen batch is counted.

5.The batches made in a month are grouped into which day they were made.Then some days are randomly picked and every batch made that day is counted to determine the number of defective items.

Sampling Terms:

a)Systematic sampling

b)Simple random sampling

c)Stratified sampling

d)Cluster sampling

e)Convenience sampling