Research Methods: Probability & Significance Flashcards
When interpreting a statistical test. Where is the critical value found?
In the table provided
What is the conventional level of significance in psychology?
0.05/5%
To identify the critical value what do we need to know?
One or two tailed test
Number of participants (N) or Degrees of freedom (df)
Significance level
In the sign test the calculated value is the ….
least frequent sign
If the research is not significant which hypothesis do you accept and reject?
Accept the null hypothesis and reject the alternative hypothesis
If the research is significant which hypothesis do you accept and reject?
Accept the alternative hypothesis and reject the null hypothesis
If a researcher uses a lenient p-value. Which error may they make?
Type one error
If a researcher uses a strict p-value. Which error may they make?
Type two error
What may the researcher think if they make a type one error?
Think the results are significant when they are not
What may the researcher think if they make a type two error?
Think the results are not significant when they are
In a type one error which hypothesis does a researcher wrongly accept and reject?
Wrongly accept the alternative hypothesis and reject the null hypothesis
In a type two error which hypothesis does a researcher wrongly accept and reject?
Wrongly accept the null hypothesis and reject the alternative hypothesis
How do you check for a type one error?
Go to a stricter level of significance. If it stays significant there is no error. if it becomes not significant there is an error
How do you check for a type two error?
Go to a lenient level of significance. If it stays not significant there is no error. if it becomes significant there is an error
Which significance level strikes the balance between making a type one or type two error?
0.05/5%