1 / 7

Sampling Variability

Sampling Variability. Every Sample taken from a population gives different measures(statistics/parameters) Usually only one sample is looked at to get information about a population. Measures taken from a sample are the MEDIAN MEAN INTERQUARTILE RANGE (IQR = UQ – LQ)

charla
Download Presentation

Sampling Variability

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. Sampling Variability

  2. Every Sample taken from a population gives different measures(statistics/parameters) • Usually only one sample is looked at to get information about a population

  3. Measures taken from a sample are the • MEDIAN • MEAN • INTERQUARTILE RANGE (IQR = UQ – LQ) • MINIMUM,MAXIMUM VALUES and RANGE

  4. The mean median and IQR of different samples from the same population are similar to each other • These measures are likely to give a good estimate of the population measures.

  5. The minimum, maximum and range of different samples are NOT similar to each other • They are UNLIKELY to give good estimates of the minimum, maximum or range of the population.

  6. The Shape of samples and any unusual features may not be representative of the shape and unusual features of the population.

  7. As sample size increases, SAMPLING VARIABILITY decreases so estimates of the population parameters/statistics/measures are better.

More Related