Using Statistics - inferential 4.5

Using Statistics - inferential 4.5 - Using Statistics:...

Info iconThis preview shows pages 1–7. Sign up to view the full content.

View Full Document Right Arrow Icon
Click to edit Master subtitle style 6/3/11 Using Statistics: Inferential Stats 4/5/2010 PSYC E226
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
6/3/11 Learning Objectives Understand the use of inferential statistics Be familiar with five components of hypothesis testing Know what a significant result means Understand type I and type II errors Be familiar with three influences on significance of results
Background image of page 2
6/3/11 What are inferential statistics? What are descriptive statistics? Inferential statistics use results from samples to generalize to population l Estimate a population parameter using probability and find out how close our statistic is Parameter is for a population Statistic is for a sample l If our results are significant, it means that
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
6/3/11 Sampling Error Sampling error is the naturally occurring difference between the statistic and parameter l It is the result of sampling bias, how the sample is different from the population l Any two samples – even if random – will be different from each other and from the population
Background image of page 4
6/3/11 Hypothesis Testing The hypothesis is tested to see if it is supported in the population of interest The hypothesis is compared to a null hypothesis , which is typically that there is not a relationship between the variables l Hypothesis: those who sleep less the night before the task will perform worse l Null hypothesis: people will not perform differently based on sleep
Background image of page 5

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
6/3/11 Hypothesis Testing: Some terms The standard error is a measure of the average distance of the sample statistic
Background image of page 6
Image of page 7
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 19

Using Statistics - inferential 4.5 - Using Statistics:...

This preview shows document pages 1 - 7. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online