The following table shows the number of shirts by sizes that are manufactured in a factory on a particular week: Extra Small=390 Small=470 Medium=520 Large=680 Extra Large=440
The following table shows the number of shirts by sizes that are manufactured in a factory on a
particular week:
Extra Small=390
Small=470
Medium=520
Large=680
Extra Large=440
a) It was discovered that the sizing of some shirts was labelled incorrectly.
(i) Give two reasons why it would be necessary to examine a sample of the shirts produced rather than examine the entire weekly production.
(ii) State two differences between a cluster sample and a stratified random sample in this situation.
(iii) Using the stratified random sampling technique, calculate the number of medium shirts that will be selected if we require a sample of 375 shirts.
(iv)State one advantage of using stratified random method for collecting this sample.
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