Module 6 Flashcards
Statistical significance definition
A result is unlikely to be from random chance
When is a result statistically significant?
If the p value is less than alpha
Do you accept or reject the null hypothesis if a result is statistically significant?
You reject it
What exactly does a p-value mean?
Probability of obtaining a value greater than or equal to the sample statistic by chance
Test Statistic
Distance from the null hypothesis in terms of standard deviation; Z value
When do we reject the null hypothesis?
When a result is statistically significant; when the calculated p value is <= alpha
Why do we use two-tailed tests?
To determine whether or not a parameter is greater than or equal to a range of values
When making a conclusion about a hypothesis test, do we discuss the population or sample?
The population
When do you subtract the p-value from one?
If the hypothesis is talking about an increase
