1 / 1

Stratified Sampling

ugo
Download Presentation

Stratified Sampling

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

    1. Stratified Sampling Stratified sampling uses a small sample from a population to accurately represent each element of that population. See the following example. A company employs 1000 people. A stratified random sample of the employees is to be selected to form a committee. Calculate the number of people from each department who should be selected to form a committee of size 40. The number employees in each department are as follows: Management 55 Shopfloor 650 Engineering 170 Administration 125 The stratified sample will be calculated as follows: Management: 55 ? 1000 ? 40 = 2.2 Therefore 2 people (round to nearest whole number) Shopfloor: 650 ? 1000 ? 40 = 26 Therefore 26 people (no rounding required) Engineering: 170 ? 1000 ? 40 = 6.8 Therefore 7 people Admin: 125 ? 1000 ? 40 = 5 Therefore 5 people (Check: 2 + 26 + 7 + 5 = 40)

More Related