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Which two would be “valid statistical conclusions”?
Correct rejection & correct retention
Which two would be “invalid statistical conclusions”?
False alarm & miss
What is a type I error?
Rejecting H0 when it shouldn’t be rejected
What is a type II error?
Retaining H0 when it should be rejected
What is another name for a false alarm?
Type I error
What is the name for a miss?
Type II error
What is it called when you mistakenly decide the variables are related in the target population?
Type I error or False Alarm
What is it called when you mistakenly conclude the variables are not related in the target population?
Type II error or a miss
What is it called when you correctly conclude the variables are related in the target population but get the direction or pattern wrong?
Type III error or a misspecification
What error/s may be the result of poor sampling, poor measurement or sampling variability?
Type I, II and III errors
What error/s may be the result of poor sampling, poor measurement or sampling variability AND having a too small sample?
Type II error
If H0 is true in the pop, p<0.5 will lead you to make what descion and what error?
correct retention and type I error (false alarm)
If H0 is true in the pop, p>.05 will lead you to make…
a correct retention
If H0 is false in the pop, p>.05 will lead you to make what kind of error?
Type II aka a miss
If H0 is false in the pop, p<.05 will lead you to make a…
correct rejection
What does NHST stand for?
Null Hypothesis Significance Testing
What is the process of NHST?
State the Hypotheses
Set Significance Level
Collect/Analyze Data
Determine the P-value
Make Decision
Interpret Results
What are the possible outcomes of NHST?
correct retention: Rejecting the null hypothesis when p<0.5.
correct rejection: We fail to reject H0 when the p>0.5
Type 1 error: Reject H0 when its actually true.
Type 2 error: Fail to reject H0 when its actually false
Type 3 error: Rejecting H0 for the wrong reason.