Descriptive Stats

Descriptive Stats

1. Parmenters:

   • descriptions of populations. e.g try to estimate the population mean (a parameter) from the sample mean (a stat)

2. Measures or central tendency

   • indication of a typical score in a sample. estimate of the middle point of the distribution scores

3. Mean

   • sum of all the scores in the sample divided by the number of scores.

4. Median

   • middle score/value once all scores have been put in rank order

5. Mode

   • Most frequently ocurring score in that sample

6. Sampling Error

   • difference between the population parameter and the sample statistic