# Shared Flashcard Set

## Details

Frequentist Hypothesis Testing
biostats
13
Mathematics
01/25/2018

Term
 statistical null hypothesis
Definition
 specific claim about a population parameter, usually assumes the negative or skeptical point of view (there is no change, unrelated)
Term
 alternative hypothesis
Definition
 represents all other possible parameters except the one the null is stating
Term
 parameter
Definition
 measurable factor that defines or helps define a population
Term
 estimate
Definition
 inference about a population parameter from sample data
Term
 test statistic
Definition
 specific number or quantity calculated from the data that is used to compare the data gathered to the expected values based on the null
Term
 sampling distribution
Definition
 calculated from the estimate, it is the distribution of a sampling statistic (e.g. mean) if calculated from many different samples many times
Term
 the null distribution
Definition
 is the sampling distribution of outcomes for a test statistic that assumes that the null hypothesis is true
Term
 p-value
Definition
 probability of obtaining data under the null hypothesis
Term
 significance level
Definition
 threshold for accepting or rejecting the null based on the p-value (usually .05) if it is below .05, you reject the null
Term
 type 1 error
Definition
 mistakenly rejecting a true null hypothesis. The significance level is the probability of a type 1 error (.05 means 1 in 20 chance, which is acceptable)
Term
 type 2 error
Definition
 fail to reject a false null, study with a low probability of type 2 error is said to have a high power.
Term
 power
Definition
 probability that a random sample will lead to rejection of a false null hypothesis
Term
 In what order do you list these definitions?
Definition
 1.null hypothesis 2. alternative hypothesis3. parameter 4. estimate 5. test statistic6. sampling distribution 7. null distribution8. p-value 9. significance level10. type 1 error 11. type 2 error 12. power
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