Levels of significance

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What does the P-value represent?
The probability of something happening by chance.
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What can the P-value range from and to?
0-1 where 0 represents no influence of chance.
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What is often used and what does this mean?
P < 0.05 = P is less than or equal to 0.05
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What does 0.05 mean in terms of percentage results are due to chance?
0.05 = 5% chance that results are due to chance.
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What does the level of significance refer to?
P- value we set that makes us believe results are due to the IV
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What does P < 0.1 mean?
90% sure results are due to IV.
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What does P < 0.01 refer to?
99% sure the results are due to IV.
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What is a type 1 error?
Significant difference found because level of significance has not been set high enough - Null was rejected.
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What is a type 2 error?
Not found a significant difference because level of significance was set too high (accepted null).
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What does a type 1 error claim?
Claims something is true which isn't.
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What does a type 2 error claim?
Claims something isn't true that actually is.
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Describe the observed value
Calculated value from our data collected.
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Where can the critical value be found?
Found on the critical values table.
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When is there a significant difference?
When the observed value is higher than the critical value.
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Card 2

Front

What can the P-value range from and to?

Back

0-1 where 0 represents no influence of chance.

Card 3

Front

What is often used and what does this mean?

Back

Preview of the front of card 3

Card 4

Front

What does 0.05 mean in terms of percentage results are due to chance?

Back

Preview of the front of card 4

Card 5

Front

What does the level of significance refer to?

Back

Preview of the front of card 5
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