This preview shows page 1. Sign up to view the full content.
090607
Introduction To Statistics
Notes
Ch. 13
important to focus on interpretation of data and results rather than the actual mathematics
when sample data are collected in an inappropriate way, such as a
voluntary response sample
, no
statistical methods will be capable of producing valid results
statistics can be misused intentionally and unintentionally and can be deceptive
samples can be bad in the sense that the sampling method dooms the sample so that it is likely to be
biased, or not representative of the population from which it has been obtained
voluntary response samples that by their nature are seriously flawed include internet polls, mailin polls,
and telephone callin polls (all participants can choose whether or not to answer)
valid conclusions can be made only about the specific group of people who chose to participate
it is common to incorrectly state or imply conclusions about a larger population

small samples
This is the end of the preview. Sign up
to
access the rest of the document.
This note was uploaded on 04/17/2008 for the course MATH unknown taught by Professor Sapko during the Fall '08 term at Mass Colleges.
 Fall '08
 Sapko
 Statistics

Click to edit the document details