Probability & Errors (OCR A-Level Psychology): Flashcards
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13 cards from this deck
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Practise the cards
13 cards from this deck
Usual significance level in psychology
Usual significance level in psychology
0.05 or 5% (written as p<0.05)
Critical value definition
Critical value definition
Cut-off point to accept or reject null hypothesis
Where critical values are found
Where critical values are found
Table of critical values
Name for result of statistical test
Name for result of statistical test
Calculated or observed value
How to check for statistical significance
How to check for statistical significance
Compare calculated value with critical value
When one-tailed test is used
When one-tailed test is used
When hypothesis is directional
When two-tailed test is used
When two-tailed test is used
When hypothesis is non-directional
Three criteria for critical value tables
Three criteria for critical value tables
Test type (1 or 2-tailed), N or df, significance level
Type I error definition
Type I error definition
Null hypothesis rejected when it should be accepted (is true)
Type I error alternative name
Type I error alternative name
False positive
What Type I error means
What Type I error means
Claiming significant difference when one doesn't exist
Type II error definition
Type II error definition
Null hypothesis accepted when alternative is true
Type II error alternative name
Type II error alternative name
False negative