Unit 9 Flashcards
A formal procedure for using observed data to decide between two competing claims
Significance Test
The claim that we weigh evidence against in a significance test
Null Hypothesis
The claim that we are trying to find evidence for
Alternative Hypothesis
An alternative hypothesis that states that a parameter is greater than or less than the null value
One-Sided
An alternative hypothesis that states that a parameter is different from the null value
Two-Sided
The probability of getting evidence for the alternative hypothesis as strong or stronger than the observed evidence when the null hypothesis is true
P-value
The value that we use as a boundary for deciding whether an observed result is unlikely to happen by chance alone when the null hypothesis is true
Significane Level
Occurs if we reject H0 when H0 is true
Type I Error
Occurs if we fail to reject H0 when Ha is true
Type II Error
Measures how far a sample statistic is from what we would expect if the null hypothesis were true
Standardized Test Statistic
The probability that the test will find convincing evidence for Ha when a specific alternative value of the parameter is true
Power
